Hif fliddy,
There will always be bullying in the Army,
I've been out now for over thirty years, but that aspect of it will never change, but the incidences of it would be few and far between,
I can understand your worry as a parent, in the light of places like Deepcut, but be re-assured, if your son gets on with people, its not likely to happen to him.
Its a good thing your son is considering, its a good life, and if he goes in with the right attitude, he could go far.
Good luck to him.