Unfortunately, there are people who argue that these things encourage people to be promiscuous, and thus are bad.
And this is, I think, the greatest failing of social governing. Promiscuity is risky behavior, but not a violation of anyone's rights, and thus is not something the government should be taking a stand on. You wanna discourage risky behavior? Teach your kids not to do it. Other parents may be just as adamant about extreme sports, but it would be silly to ban them unless there was a danger to the public.
Seriously, was there a debate back in the day that adding federal law requiring seat belts in cars would encourage people to drive dangerously? My knowledge of US law is fuzzy on that, but it wouldn't surprise me.
edited 22nd Feb '11 3:41:54 AM by Ratix