Apple has removed iChatr, a Chatroulette-style app for the iPhone 4, from the App Store, due to too many people exposing themselves.
OK, that’s something to be expected on a Chatroulette-like service, but here’s the thing. You could very easily make a Chatroulette-like service that uses phone numbers, completely avoiding the app store, and then making FaceTime calls. (Granted, Chatroulette and iChatr have better privacy than that approach.)
Or, you could even have a single number for a FaceTime service that acts like Chatroulette. Call the number, hit FaceTime, get a random partner. Want to switch partners, hang up and call back. (Or, if the other person hangs up, it could autoswitch.)
And, there’s nothing stopping people from exposing themselves on FaceTime.