I agree and disagree with this sentiment. It's part of the reason I tend to play this game the way I do (avoiding mind control, rape, and most things that would effect consent). BUT that's because of who I am, not the MC. And if I think back a bit I have to admit I was a piece of shit not long before graduating high school.
I genuinely don't think I would have abused supernatural powers at 18 (at least not in a way that would be rapey, free money on the other hand...) but at 15 or 16? I'd probably have been a fucking monster. People mature at different rates. So I don't think it's outside the realm of possibility to say an immature MC would go full sociopath given the chance.