This is motivated by a recent post on MSE which asks for fake proofs that there are only finitely many primes.
The tag wiki of fake-proofs says:
"seemingly flawless arguments are often presented to prove obvious fallacies (such as $0=1$). This is the appropriate tag to use when asking "Where is the proof wrong?" about proofs of such obvious fallacies."
From this I assume that the tag should be used when someone were given a proof to a false statement and were trying to figure out the flaw.
I voted to close that post, but retracted the vote since I am not so sure. If every answers to that post introduce a fake proof and point out why the answer is wrong, then it seems the post would be a useful one (as a duplicate target).
What is your opinion on that?
Depending on the discussion here, we might need to edit the tag wiki to reflect that.