Hmm...I haven't had a chance to peruse the "gallery" of ads yet, so I can't say, but that does sound like something I, for one, wouldn't want associated with my work. (Nothing against Yny-u, just that type of work, nudes and suchlike, in general)
And yeah, I know of at least a few smallish children who read Beastling/PE, so I should think there'd be rules for the ads, or at least a way to block certain ones.