Otep has some songs about abuse/rape. Jonestown Tea comes to mind.
As well as Emilie Autumn's Gothic Lolita.
Date Rape by Sublime is actually kind of funny (wait till the end).
Daddy by Korn. Actually, a lot of Korn songs can fit this bill. Evanescence's cover of Thoughtless is good for this kind of thing.
I'll add more if I think of any
.