This is not really true. You keep linking to the same thread again and again, but as I explained in another thread, an obscure text command that cannot be combined with other filters is NOT a real solution to this problem.
People continue to request this feature because you have not solved the underlying problem at all. Continually reposting the same link to the same archived thread with the same inadequate solution is simply IGNORING the problem and telling people "it's already possible" is simply inaccurate. No it is NOT possible in any real sense to negatively filter tags on this site in a way that is actually USABLE.