If you start expressing opinions about how sex with a sex-trafficked child should be legal, won't your friends and family raise some questions about your character?
Unless we're talking of morally flexible individuals. And at least parents should raise an eyebrow, since we have this natural reaction to protect our children.
> information wants to be free
Whomever said that was probably thinking of facts, of knowledge, s/he was probably not thinking of having opinions about pedophiles.
EDIT: don't get me wrong, I think there's a time and place to argue that consensual sex with teenagers might be ok and I think people should be free to make that argument, the problem in this case is that the sex couldn't have been consensual, in which case age becomes relevant, as that teenager isn't fully developed, therefore the harm done is amplified.
And also these opinions have been delivered by a very public figure, with a history of harassing women.
Words matter so the lesson here is don't be a jerk, as technology won't save you from that.