diff --git a/app/views/user_admin/user_stat.html.haml b/app/views/user_admin/user_stat.html.haml
--- a/app/views/user_admin/user_stat.html.haml
+++ b/app/views/user_admin/user_stat.html.haml
@@ -34,6 +34,7 @@
       %th Activated?
       %th Logged in
       %th Contest(s)
+      %th Remark
       - @problems.each do |p|
         %th= p.name
       %th Total
@@ -49,6 +50,7 @@
             %td= sc[i].activated
             %td= sc[i].try(:contest_stat).try(:started_at)!=nil ? 'yes' : 'no'
             %td= sc[i].contests.collect {|c| c.name}.join(', ') 
+            %td= sc[i].remark
           - else
             %td= sc[i][0]
             - total += sc[i][0]
diff --git a/db/migrate/20150203153534_add_more_to_users.rb b/db/migrate/20150203153534_add_more_to_users.rb
new file mode 100644
--- /dev/null
+++ b/db/migrate/20150203153534_add_more_to_users.rb
@@ -0,0 +1,6 @@
+class AddMoreToUsers < ActiveRecord::Migration
+  def change
+    add_column :users, :enabled, :boolean, default: 1
+    add_column :users, :remark, :string
+  end
+end
diff --git a/db/schema.rb b/db/schema.rb
--- a/db/schema.rb
+++ b/db/schema.rb
@@ -11,7 +11,7 @@
 #
 # It's strongly recommended to check this file into your version control system.
 
-ActiveRecord::Schema.define(:version => 20140917150629) do
+ActiveRecord::Schema.define(:version => 20150203153534) do
 
   create_table "announcements", :force => true do |t|
     t.string   "author"
@@ -239,6 +239,8 @@
     t.boolean  "activated",                     :default => false
     t.datetime "created_at"
     t.datetime "updated_at"
+    t.boolean  "enabled",                       :default => true
+    t.string   "remark"
   end
 
   add_index "users", ["login"], :name => "index_users_on_login", :unique => true