Until there is recourse for the devs to remove the tags, or the users to remove fake/frivolous tags, allowing something like this will only lead to abuse and ruining the rest of the system along with it.

Hard pass, things are never useful with a paintbrush, there is always usecases. And when you can damage a devs credibility or job with some simple non-removable flag, that you can do as a joke or just fuck with them, with absolutely no moderation or punishment…. Thats a problem.