Let not totally ascribed mixers to criminiaties just like the admin mentioned that not all mixers are bad actors, but a situation where one or two of those bad actor mixer can be trace to this forum is what the admin is trying to prevent it long time effect on members and the forum itself.
A service or a payment method in itself isn't bad. Its features aren't bad. A mixer isn't bad. Mixing illegally obtained coins is bad.
If we put such tags on money, then all fiat should be classified as bad. What did criminals use before 2009? It wasn't that long ago. Drugs, children pornography, bribes, illegal weapons, and murders were all financed by fiat like the USD. Still, you don't ban the words "fiat", "cash", or "USD" because of that and treat everyone as rule breakers because they mentioned such terms.
These mixers will realize that the comparison of traffic that they'll get there and here are totally way out of the league.
That's also why the payrate is so low there compared to what was and is still offered on Bitcointalk. Here, you used to get $5-7 (up to $10) now. I doubt you will get more than $1.5-2.0 on AltcoinsTalk.