Fencer: Not when he's logged in. But the first time he visits the bookmark after opening the browser he isn't logged in and will see the ads. But since this is the case only once or twice a day, he doesn't want to keep an extra bookmark for that.
Anyway, the point is that one sponsor seems to behave really bad, and to even be a potential security issue for BrainKing users, which is somewhat very undesirable.