What I'm trying to get across is how much more dangerous anal sex is than vaginal sex. Based upon my own observations, the porn industry is not being anywhere near careful enough. Unfortunately, gentle anal sex isn't likely to sell anywhere near as well. In fact, it seems to me that there's a trend towards even rougher anal sex.
I think we disagree about both the existence of and the magnitude of the problems mentioned. The porn industry won't limit itself, especially if no one in it acknowledges that there are problems.
Thus, IMO, regulation is inevitable. That'll anger a lot of people, but it'll promote my cause (education).
NB: The information about the risks and anatomy of anal sex are in the link included in my sig, in case that wasn't clear enough before. The page is maintained by me and I make no money off of it. If you've not clicked that for some reason (e.g. paranoia), let me know and I will provide them here.