diff --git a/app/assets/javascripts/admin/templates/users_list.hbs b/app/assets/javascripts/admin/templates/users_list.hbs
index e5d1a413a..36ae00e22 100644
--- a/app/assets/javascripts/admin/templates/users_list.hbs
+++ b/app/assets/javascripts/admin/templates/users_list.hbs
@@ -9,6 +9,7 @@
       <li>{{#link-to 'adminUsersList.show' 'staff'}}{{i18n admin.users.nav.staff}}{{/link-to}}</li>
       <li>{{#link-to 'adminUsersList.show' 'suspended'}}{{i18n admin.users.nav.suspended}}{{/link-to}}</li>
       <li>{{#link-to 'adminUsersList.show' 'blocked'}}{{i18n admin.users.nav.blocked}}{{/link-to}}</li>
+      <li>{{#link-to 'adminUsersList.show' 'suspect'}}{{i18n admin.users.nav.suspect}}{{/link-to}}</li>
     </ul>
   </div>
   <div class="pull-right">
diff --git a/app/controllers/admin/users_controller.rb b/app/controllers/admin/users_controller.rb
index 6649d2223..efd9b3be4 100644
--- a/app/controllers/admin/users_controller.rb
+++ b/app/controllers/admin/users_controller.rb
@@ -32,7 +32,7 @@ class Admin::UsersController < Admin::AdminController
       StaffActionLogger.new(current_user).log_show_emails(users)
     end
 
-    render_serialized(users, AdminUserSerializer)
+    render_serialized(users, AdminUserListSerializer)
   end
 
   def show
diff --git a/app/serializers/admin_user_list_serializer.rb b/app/serializers/admin_user_list_serializer.rb
new file mode 100644
index 000000000..0f04ce90f
--- /dev/null
+++ b/app/serializers/admin_user_list_serializer.rb
@@ -0,0 +1,78 @@
+class AdminUserListSerializer < BasicUserSerializer
+
+  attributes :email,
+             :active,
+             :admin,
+             :moderator,
+             :last_seen_age,
+             :last_emailed_age,
+             :created_at_age,
+             :username_lower,
+             :trust_level,
+             :trust_level_locked,
+             :flag_level,
+             :username,
+             :title,
+             :avatar_template,
+             :can_approve,
+             :approved,
+             :suspended_at,
+             :suspended_till,
+             :suspended,
+             :blocked,
+             :time_read
+
+  [:days_visited, :posts_read_count, :topics_entered, :post_count].each do |sym|
+    attributes sym
+    define_method sym do
+      object.user_stat.send(sym)
+    end
+  end
+
+  def include_email?
+    # staff members can always see their email
+    (scope.is_staff? && object.id == scope.user.id) || scope.can_see_emails?
+  end
+
+  alias_method :include_associated_accounts?, :include_email?
+
+  def suspended
+    object.suspended?
+  end
+
+  def can_impersonate
+    scope.can_impersonate?(object)
+  end
+
+  def last_emailed_age
+    return nil if object.last_emailed_at.blank?
+    AgeWords.age_words(Time.now - object.last_emailed_at)
+  end
+
+  def last_seen_age
+    return nil if object.last_seen_at.blank?
+    AgeWords.age_words(Time.now - object.last_seen_at)
+  end
+
+  def time_read
+    return nil if object.user_stat.time_read.blank?
+    AgeWords.age_words(object.user_stat.time_read)
+  end
+
+  def created_at_age
+    AgeWords.age_words(Time.now - object.created_at)
+  end
+
+  def can_approve
+    scope.can_approve?(object)
+  end
+
+  def include_can_approve?
+    SiteSetting.must_approve_users
+  end
+
+  def include_approved?
+    SiteSetting.must_approve_users
+  end
+
+end
diff --git a/app/serializers/admin_user_serializer.rb b/app/serializers/admin_user_serializer.rb
index 9d40ee61d..717316039 100644
--- a/app/serializers/admin_user_serializer.rb
+++ b/app/serializers/admin_user_serializer.rb
@@ -1,88 +1,16 @@
-class AdminUserSerializer < BasicUserSerializer
+require_dependency 'admin_user_list_serializer'
 
-  attributes :email,
-             :active,
-             :admin,
-             :moderator,
-             :last_seen_age,
-             :last_emailed_age,
-             :created_at_age,
-             :username_lower,
-             :trust_level,
-             :trust_level_locked,
-             :flag_level,
-             :username,
-             :title,
-             :avatar_template,
-             :can_approve,
-             :approved,
-             :suspended_at,
-             :suspended_till,
-             :suspended,
-             :ip_address,
-             :registration_ip_address,
+class AdminUserSerializer < AdminUserListSerializer
+
+  attributes :associated_accounts,
              :can_send_activation_email,
              :can_activate,
-             :can_deactivate,
-             :blocked,
-             :time_read,
-             :associated_accounts
+             :ip_address,
+             :registration_ip_address,
+             :can_send_activation_email
 
   has_one :single_sign_on_record, serializer: SingleSignOnRecordSerializer, embed: :objects
 
-  [:days_visited, :posts_read_count, :topics_entered, :post_count].each do |sym|
-    attributes sym
-    define_method sym do
-      object.user_stat.send(sym)
-    end
-  end
-
-  def include_email?
-    # staff members can always see their email
-    (scope.is_staff? && object.id == scope.user.id) || scope.can_see_emails?
-  end
-
-  alias_method :include_associated_accounts?, :include_email?
-
-  def suspended
-    object.suspended?
-  end
-
-  def can_impersonate
-    scope.can_impersonate?(object)
-  end
-
-  def last_emailed_age
-    return nil if object.last_emailed_at.blank?
-    AgeWords.age_words(Time.now - object.last_emailed_at)
-  end
-
-  def last_seen_age
-    return nil if object.last_seen_at.blank?
-    AgeWords.age_words(Time.now - object.last_seen_at)
-  end
-
-  def time_read
-    return nil if object.user_stat.time_read.blank?
-    AgeWords.age_words(object.user_stat.time_read)
-  end
-
-  def created_at_age
-    AgeWords.age_words(Time.now - object.created_at)
-  end
-
-  def can_approve
-    scope.can_approve?(object)
-  end
-
-  def include_can_approve?
-    SiteSetting.must_approve_users
-  end
-
-  def include_approved?
-    SiteSetting.must_approve_users
-  end
-
   def can_send_activation_email
     scope.can_send_activation_email?(object)
   end
diff --git a/config/locales/client.en.yml b/config/locales/client.en.yml
index 15a332039..a22f8aab1 100644
--- a/config/locales/client.en.yml
+++ b/config/locales/client.en.yml
@@ -1895,6 +1895,7 @@ en:
           staff: 'Staff'
           suspended: 'Suspended'
           blocked: 'Blocked'
+          suspect: 'Suspect'
         approved: "Approved?"
         approved_selected:
           one: "approve user"
@@ -1916,6 +1917,7 @@ en:
           moderators: 'Moderators'
           blocked: 'Blocked Users'
           suspended: 'Suspended Users'
+          suspect: 'Suspect Users'
         reject_successful:
           one: "Successfully rejected 1 user."
           other: "Successfully rejected %{count} users."
diff --git a/lib/admin_user_index_query.rb b/lib/admin_user_index_query.rb
index 281049910..f2420f15a 100644
--- a/lib/admin_user_index_query.rb
+++ b/lib/admin_user_index_query.rb
@@ -11,15 +11,7 @@ class AdminUserIndexQuery
   attr_reader :params, :trust_levels
 
   def find_users(limit=100)
-    find_users_query.includes(:user_stat)
-                    .includes(:single_sign_on_record)
-                    .includes(:facebook_user_info)
-                    .includes(:twitter_user_info)
-                    .includes(:github_user_info)
-                    .includes(:google_user_info)
-                    .includes(:oauth2_user_info)
-                    .includes(:user_open_ids)
-                    .limit(limit)
+    find_users_query.includes(:user_stat).limit(limit)
   end
 
   def count_users
@@ -32,10 +24,10 @@ class AdminUserIndexQuery
     if params[:query] == "active"
       order << "COALESCE(last_seen_at, to_date('1970-01-01', 'YYYY-MM-DD')) DESC"
     else
-      order << "created_at DESC"
+      order << "users.created_at DESC"
     end
 
-    order << "username"
+    order << "users.username"
 
     klass.order(order.reject(&:blank?).join(","))
   end
@@ -47,6 +39,20 @@ class AdminUserIndexQuery
     end
   end
 
+  def suspect_users
+    where_conds = []
+
+    # One signal: no reading yet the user has bio text
+    where_conds << "user_stats.posts_read_count = 0 AND user_stats.topics_entered = 0 AND COALESCE(user_profiles.bio_raw, '') = ''"
+    # Another surprising signal: Username ends with a number
+    where_conds << "users.username ~ '[0-9]+$'"
+
+    @query.activated
+          .references(:user_stats)
+          .includes(:user_profile)
+          .where(where_conds.map {|c| "(#{c})"}.join(" AND "))
+  end
+
   def filter_by_query_classification
     case params[:query]
       when 'staff'      then @query.where("admin or moderator")
@@ -55,6 +61,7 @@ class AdminUserIndexQuery
       when 'blocked'    then @query.blocked
       when 'suspended'  then @query.suspended
       when 'pending'    then @query.not_suspended.where(approved: false)
+      when 'suspect'    then suspect_users
     end
   end