The problem with nudity (not even porn) on this site is it's a public forum, open to minors. It isn't allowed to display images of that kind. It's the same on every vscope forum, and any forum that doesn't require you to be 18 or 21 + to sign up.
If they were fake and it was a cancer awareness advert, I personally don't think he should be banned, or infracted, under 'porn'.
Just my 2 cents.