Keeping separate lists of parent objects

OK here's the deal. I have a Verification object that I want to use
to allow users to verify data (Posts, Pics, Addresses, etc). Each
Post, Address, etc object will be related 1:1 to a Verification
object.

But I want to have the Verification keep 3 separate lists of users. I
have generated the following migration code, but i don't think it's
going to work properly:
  def self.up
    create_table :verifications do |t|
      t.references :voted_real
      t.references :voted_fake
      t.references :flagged

      t.timestamps
    end

See I want voted_real to be a list of users who have voted "Real",
similarly :voted_fake should be a list of users who have voted "Fake"
and flagged to be a list of users who have "flagged" content (as
offensive, inappropriate, etc).

So you see, the standard options for ActiveRecord Associations will
not suffice (as far as I can tell).

Can someone help me out here? I maybe just need a different design or
maybe I can use polymorphic associations, but I'm not sure yet. I
think I can use polymorphic associations to associate the
Verifications to the other objects, but not to accomplish what I want
to do with the Verification to User relationship(s).

I appreciate your help!!

-Steve

I think I've figured it out. Sorry for posting what amounts to an
architectural question here, I'm guessing that's not really what this
board is for.

For anyone curious about what I decided to do:

I haven't totally decided yet. I might trash the idea of a
"Verification" class, and instead opt for a Vote class:
Vote:
type
user

Then it would be a polymorphic association like this:
class Vote < ActiveRecord::Base
  belongs_to :voteable, :polymorphic => true
end

class Post < ActiveRecord::Base
  has_many :votes, :as => :voteable
end

class Product < ActiveRecord::Base
  has_many :votes, :as => :voteable
end