As someone who is able to edit posts, I have been using the ability to mark posts as duplicates inside the OP question using the block quote with the text 'Possible Duplicate' or 'Exact Duplicate'. To clean up the question faster, I had been flagging the post for moderator attention but there are likely fewer moderator users on at a time than 3k and above users.
Having said that, is there a better way to mark questions as duplicates (tagging? downvoting?) that is universally accepted or understood to get the attention of those who can close or migrate the questions?
It would be nice to have a 3k user panel or something to indicate questions that need attention and cleanup. As someone who does not yet have the ability to close or migrate, I don't mind doing the yeoman's job of finding those questions that need attention so someone else with enough rep can deal with them, but it would nicer for the ability for them to be easily filtered by those who can deal with them.