Actually I always had a bad habit of lingering around with hands in my pockets when bored. But outside of my basic training and AIT I never had an NCO in my face about anything. Its kind of counter productive outside of a training environment. Usually if I did something an NCO or officer didn't like they would pull me to the side and tell me. Not that I didn't see my fair share of officers yelling. Once when our company was doing some training exercises prior to our deployment our company commander got on a bull horn and started to yell and cuss us out because we weren't shutting up fast enough for him.