I agree fully with what ID has said here. Whilst I agree people can be hurt on emotional level virtual rape is not really possible. Close the window/program when someone becomes obnoxious and its all over. Then block em if it's on a chat program etc.
The online environment should be used to do the things we may not have the opportunity to do in real life or to hook up with people we can do them with. Safe, sane and consential that's what matters.