I second Midlo Dad's information and will add a little story of my son. When he was 11, we were in Little League district playoff and starting pitcher was giving up hits. We were going to lose the game, son tells pitcher he was reason team was losing, not that the bats were quiet. That boy's dad is still preaching this story to me and others 7 years later. Now I did not condone this behavior, son was 11, what can one say other than he was wrong. That pitcher is in college and doing quite well, and was drafted out HS. Now fast forward to 2008 and college coach tells a confident who recommended they look at son that he had "bad body language". That one really floored me because son has greatly improved at that point. It has made me be more observant of other players and I will tell you that it is very easy to spot if you know what to look for. Son is on loaded summer team and we have a couple of real "body language types". And heaven forbid hope your son doesn't vent in public.