As the mother of a 5yr old daughter, the the thought has already crossed my mind, when i was a teenager we would be out ALL day on our pushbikes, horse riding or just walking about with the dogs, i really don't think i will allow her to do that when she is a (young) teenager, which is very very sad, however, i think if i could afford a professionally trained GSD to be by her side i would do it, i don't mean a dog to attack on her command, i mean a well bred, well balanced dog that would have a bloody good go if it needed to and be a deterrent for any dirty that happen to be lurking about