If its a fight, fight to win. groin as good as place as any to get the job done.
To an above poster: I took hapkido for several years and i'm sorry to say that I found it quite lacking in a lot of areas. Reality being one of them.
Hapkido is a mix of karate and judo. The problem I found with hapkido was that it focuses quite a bit on kicks and other forms of attack that mess your balance and in a fight, especially when you're in true danger, thats something that you dont want to happen. That is why if you go to your kid's practices and watch the black belts or brown belts you'll notice they fight keeping their distance and its only when they end up grappling that they get close.
when was the last time a thug or bully or whatever kept his distance when attacking you? never. they come at you close and fast. Hapkido fails in real life application imo.
I moved to Judo (which is a sister art to Aikido) and man that is one hell of a good self defense art. its always up close, very fast and you utterly dominate the other salamander. Requires minimal strength (when learning at 17 I had 8 year olds that were higher belts flipping and beating the crap out of me in locks..
).
If your kid can take both judo and hapkido at the same time she'll be much better prepared. kicks and punches only serve you if the opponent sticks to the same...and bullies/thugs usually dont. hapkido's close-in techniques are borrowed from judo but pure judo has a hell of a lot more and better ones.