Someone with a gold badge in a tag can Dupe Hammer, and close it in one go, like a moderator.
Is there anything to stop a Gold Tag user from editing in that tag to close it? Or is that allowed, like edit to unvote?
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Though current tags are taken into account when checking if the person can close a question using dupe hammer, it also check if that person was the one to insert the relevant tag, and in such case it won't let them use the hammer.
So, they wouldn't be able to do this.