We're biologically hardwired to like drugs, too. That doesn't mean that we should do them or make it any less illegal. I get your point, I don't agree with a lot of the laws in America, too. But the concept you're getting at not only applies to the age of consent, but other things too: drinking, driving, etc. Each community is different in what's acceptable. Just because something is acceptable in one country doesn't mean that it should be accepted everywhere. It's just not the way the world works. As far as the age of consent laws in America, most people are fine with it. Society changes over time. By your logic we should be able to cut off a man's hand for stealing, just because it was acceptable at some point in history. Maybe it'll get changed one day, but for now it's like this.
Sure men have urges, and sure I'm sure a lot of men think that some girls under the age of 18 are attractive. But that doesn't mean that they should act on them. The same principle applies to rape.
Now onto some other points you made.
Sure some of the show's methods may not be the greatest, but its intentions are good. The men who are put on the air are the ones who are very obviously there for sex. TCAP films others, too, but not everyone makes it on the show. TCAP or not, if they were caught by the police or any other organization it would be almost as damaging to their lives. Sure they're broadcasted on television, but everything else is the same. They'd get arrested for the same reasons, even without having sex. Their lives would still be ruined, everyone would find out eventually. And everyone would know what they got caught for because they have to register as a sex offender.
Some people don't like the show. That's fine, don't watch it. It's not entertaining for all, but I don't see anything morally wrong here.