Both my daughters are in karate. They are constantly reminded that they are only to use thier martial arts, for defense puposes only. If a guy were to come up and grab them in the chest, I have no problem if they kicked them in the nads.
What I really really dislike, is seeing girls smack guys around. Boys are taught at a very early age not to hit a girl, yet parents fail to teach their daughters this same rule. Boy or girl, there's no need to hit one another.