What about discovering that you, a young girl, have been seen naked on your webcam? Can you imagine what that can do to the mind of a child/young adult? Imagine all the troubles that can bring to a human mind, and imagine if that mind can already be a little troubled.
I say pure evil. Like holocaust evil, just at a smaller scale.
Honestly (and maybe obviously) I just mentioned "holocaust" because of the "not axis of evil -evil". Of course a bully is not comparable to a genocidal regime...
But a moronic teenager potentially messing with another teenagers lives forever (Amanda Todd like), in a systematic and industrialized manner, just for laughs or some sociopath self-power acertion (not for science, not for profit, not for educational purposes) kinda reminds some nazi pseudo-doctor from the holocaust.
I think it's a bit much to compare this, but to be fare you're misquoting and leaving out the "at a smaller scale". It is most definitely sociopathic though.
What about peeping plus mind torture, bullying, public humiliation, blackmail,...
The (exclusively) peepers are probably just teenagers. The evil ones are those who don't do it for quick, funny sexual purposes.
The evil ones are those who do it for the fun of torturing the "slaves".
The evil ones are those who use the collected material for profit (or silly cyber-cred) at the expense of a young girl's mind.
In western society, they are not equivalent but are related and intersectional, esp. considering this kind of peeping is about sexual coercion and violence against women and girls, a kind of violence that gets backed up by society and its institutions.
I say pure evil. Like holocaust evil, just at a smaller scale.