That is one of the problems - it isnt
anything goes. By definition - Fanatic, i think said "no kiddy porn" - that is him imposing his own rules! Now, I dont disagree with that, and most others wouldnt. But as other forums have found (no digs here), you cant have a totally uncontrolled, post anything forum, otherwise it reduces to the lowest common denominator.
As I have already said, porn, persay is not necessarily the problem here. I would also suggest that "Anything goes" does not mean "Porn/Violence/Abuse/Illegal" either. There are lots of threads within "Anything goes" that have nothing to do with porn, but have everything to do with an open uncensored discussion. We have threads about (medically) sick relatives, people in financial trouble, peeps asking for advice on all manner of subjects. The problem seems to be related to being surprised by unexpected content.
Maybe what is needed is some form of identifier if NSFW content is posted. That does give a problem if it is posted within the context of another thread, however. Not sure how easily that could be monitored or policed. The easy answer would be not to post any. Posting links would reduce the risk of something "popping up" in front of a minor, or the boss. It would also mean that some threads which are currently stopped by filters could still be seen.
Or just ban Fanatic .