This thread is why everyone should (1) hire a lawyer that is well versed in adult entertainment law and (2) STOP asking for legal advice on a message board. Recently the US Supreme Court decided US v. Williams in which the Court found that the pandering of CP is illegal even if you, -- get ready for this one -- DO NOT EVEN HAVE CP TO SELL.
So if you even try to sell CP that you dont have, you have violated the PROTECT Act. But selling virtual CP is alive and well in the US. Go figure. How does this apply to this situation -- it means that it is possible that websites promoting Teens and/or High Schoolers could also fall under the pandering provisions of the PROTECT Act. Since as several of the previous poster pointed out, the vast majority of teens and students in high school are under the age of majority in the US.
Basically what the Court is saying is that you cannot "hook" people with claims of CP and then try to sell them 18 year olds. That in itself is a violation and punishable by a nice stint in a Federal pen...
I would advise anyone to be very careful with anything that seems to indicate you have content that is possibly CP.
Here's a link to Wikipedia about the case