No, that's the beauty of bitcointalk since theymos is trying to make the forum as free as possible, unlike other sites that tend to restrict or ban someone when they talk about the competitors or something bad on the forum.
Altcoinstalks was the example, they don't want
other people to criticize their forum.The only thing that has been banned is advertising mixing services. In the past, advertising anything illegal was prohibited, so this may happen in the future, but the most important thing is that discussion about anything is allowed, so if that forum turns into scam, it must be banned.
It's related to bad PR or legal risks.
Scam is different, it's not moderated by the forum, so they won't ban the forum.
It was removed.
Eliminating all bad PR and legal risks is a good idea - drug people can always go elsewhere. I'll remove the Silk Road thread if that's the consensus.