Joshua wasn't a little child at the time either. He was a grown man.
Well, are you going to respond to 24? I'm having fun! :^)
I'm not going to argue the point with you, my son has played it for two years and is still a very mild mannered young man. His best friend comes from a military family, they have played the game together for all that time. My son's friend is joining the army as soon as he turns eighteen.
My son plans to continue with school and college. Then perhaps on to the air force. He is interested in many languages. He has never been in trouble and is no trouble. He helps around the house, and loves his family. Playing America's Army hasn't hurt him a bit. In fact it has been a benefit to his quick thinking, confidence, and how to dedicate himself to details.
I can't speak for other parents but I have seen nothing but a benefit from the game.