[Drolefille]

The problem is, by the time this is brought into action, you've already been raped. There's penetration. And, if this becomes commonly used, guys will simply rape a girl with a stick to remove the condom and then rape her themselves.

If this induced pain in the rapist while you were still standing and in a position to run... Great. But it doesn't. By this point you've been knocked down, probably injured, and you're not going to be able to jump up and GTFO to safety as quickly. So then, your condom has injured the rapist and is causing him pain, but that's not necessarily going to stop him... Now you have an angry rapist who feels the need to get back in power over you. I really really don't want a woman to ever be in that situation. It is dangerous.

And, I don't think this is training women to be anti-male any more than carrying mace is. (Note, mace is something that you use while still standing and able to run, and is probably more immediately incapacitating.) I just think it's a really stupid idea.