I had a link to DCSE in my signature for a couple of weeks after getting invited to that family. Enthusiasm, and all that, I didn't pause to consider it might be 'advertising'. I was notified very nicely by one of the exceptionally cool mods that an 'advertiser' had complained, thus the signature had been removed. No problemo, 'cause a violation is, and I liked my old and now present signature.
Still ... I'd love to know who feels threatened by l'il 'ol BBB.
I use adblock, so there's probably a lot I'm unaware of.