curious Personally I don't consider number 1 a good use, because it is potentially getting the attacker more angry and violent. But if you are a victim, I can see how at least you would feel protected.
Usually your talking about things you know nothing about is amusing, but here it's potentially dangerous. The police advised me that the best defense is to make things difficult for the attacker. They want a quick hit with a victim who offers no resistance. So you yell, kick them, hit them, try to run, make noise, so they will leave. A b elt will put them off. They want to deal with cotton panties, not steel belts. We've talked about this before here. That's what they teach you in the many classes there are for women who live in urban areas.