A couple of years ago I had a patient who was a former drill sergeant / drill instructor ( whatever they're actually called nowadays) in one of the Armed forces, can't remember which one.
Somehow we got to talking about things unrelated to his health. He told me they had done some studies that said that the younger recruits were a lot more Trigger Happy than older recruits and that they had blamed that on the video game industry and fascination. The younger kids had no concept of consequences.
Don't know if that's in the literature anywhere, but it certainly was his point and he said it had been studied.