Who exactly said this? I'd like to see the source of this quote if you don't mind. Was this a private message?
These are words from other staff solely to protect the bitcointalk and theymos.
As for the banning of ad mixing, it's still gray, and that's what he said.
This is just a protective measure for Theymos, for Bitcointalk and (by consequence) for the Staff. For regular users there is (so far) very little risk, but if you have any doubt, go see a lawyer.
Don't overthink my words, I don't see the future, I don't have any secret information and I don't know anything about laws.