Maybe not a pedophile, technically, but 15 will still get you 20. In some States, anyway.
Regardless, he needs a meeting with four angry fathers and a rusty razor blade.
Probably not if you're 18. "Romeo and Juliet," you know.
I agree that extreme prejudice should be used, though. A lot of people don't realize that they only criterion for "being trans" is to say you are the other sex. There is literally no other factor.