Yeah it would be terrificly easy to block those, but porn sites are going to win the battle. They have spent years developing and branding their name. They aren't just going to give it all away and switch to a new domain. The p0rn sites would definitely win the battle anyways, most of them do everything legally too. And what about joke/entertainment sites. A lot of those have adult content in a special section on them. So if all the p0rn sites moved to .xxx domains, then would all the joke sites have to be moved too? Well that wouldn't make any sense because most likely, the majority of the content is "PG-13".
This would be very good extension even more easy for schools to ban such material, but then what will happen to the other extensions that are porn site’s, will they just be demised ?
I think it was weird to reject xxx and approve mobi the same time I believe xxx would be better for internet community than mobi