Umm, the rapist isn't stuck to the woman. He's stuck to the device. I think it could lead to more violence in rapes but I'm not sure that with such a violent crime it would make a huge difference. If the guy does become violent he's just making things a lot worse for himself. The crime of rape, proven now beyond a reasonable doubt in most cases, is not as serious as adding beating or murder to the rape.
I think it's a great idea.