# Clear out older inconsistencies (like multiple invitations)
    def self.ensure_consistent
      sorted = Invite.find(:all, :order => 'user_id ASC, inviter_id ASC, created_at ASC')

      skip_ids = [] # Not sure if this is necessary, but it works and not worth testing without
      sorted.each_with_index do |curr, index|
        break if index+1 == sorted.size
        next if skip_ids.include?(curr.id)
        nxt = sorted[index+1]
        if curr.user_id == nxt.user_id && curr.inviter_id == nxt.inviter_id
          skip_ids << curr.id
          curr.destroy # Rely on sorting of invitation type - ends with deleting all but most recent
        end
      end
    end