Three points.
1. I believe that if an adcom really wanted pictures of you from facebook they wouldn't have too much trouble. If any of your friends have public profiles they can check out their profiles and find pictures of you within their pictures. A lot of work for one person, though.
2. For the people who are like, "if they don't want me because of who I am I wouldn't want to go to their school anyway," that's really kind of... interesting, honestly. To say that anyone who doesn't like what you do you don't want to associate with is counterintuitive to me. But, to each his own. Either way, I would argue that (almost) any professional school, upon witnessing enough inappropriate content featuring one of their applicants in a public forum, would not accept them.
3. As such, when/if I end up applying, I'll deactivate my profile or change my name. Deactivating isn't a problem because I keep in contact with most people outside of facebook more than in facebook anyway 🙂
And no drunken stupors for me either 🙂