Just stop if it's the last solution. But I don't think forum are going to stop it just because mixer services provide an opportunity for anyone to increase privacy. Abuse of the service should be excluded even if some people use the mixer to obfuscate their bitcoin transactions for prohibited things, the conditions should be the same as when bestmixer was confiscated. This means that the forum doesn't stop advertising other mixers.

So far I haven't gotten any red flags about the existence of a mixer on bitcointalk especially to anyone using it legally.