I think that virtual stalking/harassment should be a crime -- as in, sending repeated abusive emails, "following" a person from one site to another and harassing them, posting personal photos or information about a person with threatening content... it should at least be a civil offense.

I'm not sure what "virtual rape" means, but if it is a one-time thing, there is the option to close the window, block the person on AIM/MSN, turn off the computer, etc. It's only when it's repeated harassment that it becomes a serious problem.

I have had a couple of experiences with guys who kept trying to drag online conversations into uncomfortable territory, including explicit sexual material. Luckily, both times I explained that I wasn't happy with where the chat was going and that was enough to stop them -- although this one guy was all "I'm sorry, you seemed like a very sensual person from your facebook profile..."