There's some guy who is a paid writer. He does write very articulated answers, sometimes a bit off topic, but nice nevertheless. However, he uses those answers to spam certain site. He had a first round where he only linked to that site, and we deleted all his spam and/or the entire answer.
Now he is back, this time he spams the same site but adds a link to another site hoping we won't notice one of the links is his usual spam.
Quite honestly, I find it very tedious to chase his misbehavior, and I think it shows very little respect to the community, so I'd ban him or at least flag his answers for review or whatever, but I don't see a mechanism to do so (in StackOverflow he'd be banned already).
Is it possible to implement such a mechanism? Or does it exist and I didn't see it? Or automatically flag the spammed site?
edit: just noticed there are 2 of them, both spamming the same site, and they usually post on the same questions