Since none of the downvoters have left any comments, I'm left to guess wildly about what they are disagreeing with. Perhaps they don't like the fact that I am suggesting we get rid of one rarely-used meta tag by making it a synonym of a frequently-used (although still kind of meta) tag. They are synonyms, since if something is "not working" it implies some kind of error/mistake/problem.
If people don't like the existence of the error tag and want to dispute its existence, then that should be brought up elsewhere as neither the question nor my answer are focused on that matter. I don't see any problem condensing meta tags via synonyms. It's something the community can easily do itself without having to petition a moderator for blacklisting. It also means there will be fewer tags to deal with later if we decide the dominant synonym is too meta and should be removed.
If anyone has any thoughts on the matter, I'd like to hear them.