I think they need to invent vagina inserts with razor blades... totally comfy & safe for the woman wearing it, but rapists? Buwahahahaaa! Only a few women would actually need to wear them, the deterrent factor would be Amazing!
A real part of me hopes that it will be used to stop rapes but the other part of me kinda wants to see some ( insert words here ) go to prison for life because some socially imperfect schmuck had the audacity to believe that he could talk to some socially perfect female.