Re: not so fast!

Well, like madpenguin said, it can be done anonymously.

Further, I would think that a minor intelligent yet malicious enough to frame someone for kp crimes, probably would also have a story even if they could trace the origin to them. Something like "they forced me to take off my clothes and take pictures of myself which they later had me send them". "forced" doesn't even necessarily mean physical force depending on who "asks" - a teacher can be framed as "they said my grades depended on it". And we know whose word the average cops and judges would believe...

I am reminded of the opening scenes of "Devil's Advocate", where Keanu Reeves plays the defence for a paed/hebe accused of some contact crime with a 13yo girl (It is strongly insinuated that the accused is in reality guilty and that the contact wasn't consensual either). He destroys the girl's reliability as a witness for the accusation when he asks her about sexual games she's been playing with her peers in their parties and sleepovers. That refuses the accusation's claims as to her "innocence" and apparently provides an alternative hypothesis to justify the physical evidence of her non-virgin status. My point here is that I wouldn't find too difficult for a girl or boy to do something they don't want everybody to know and later be blackmailed for it. Or conversely, that an ill-intentioned girl or boy portrays themself as the innocent victim of someone else's blackmailing in just that fashion, which would still spare them jail / juve time.