Chances are all porn will end up being filtered and anything that could be seen as porn will be blocked. And the kids will be around it in about 30 seconds. Being interesting to see if they ban facebook as it has adult content including rape imagery. And of course no american company will have follow suit as they are protected by the first amendment.
Sex Advice will probably be blocked, if it is an automated system the first few months will be very interesting and it is unlikely that it will really have much affect.