refactors conflictable behaviour

app/models/proposal.rb

@@ -1,7 +1,7 @@
 class Proposal < ActiveRecord::Base
   include Flaggable
   include Taggable
-
+  include Conflictable
 
   apply_simple_captcha
   acts_as_votable
@@ -42,11 +42,6 @@ class Proposal < ActiveRecord::Base
     cached_votes_up
   end
 
-  def conflictive?
-    return false unless flags_count > 0 && cached_votes_up > 0
-    cached_votes_up/flags_count.to_f < 5
-  end
-
   def description
     super.try :html_safe
   end