Unsportsman like conduct

[jesmael]

6th grade boys game, rec league. The team we were playing would scream at my players on every shot. Does this happen in High school or competitive travel leagues? My son plays Travel baseball and we some of it but it is discouraged most of the time. Is there any precedence that allows us to give T's on this behavior? At this level and age of play I feel it is just teaching poor sportsman ship and want to stop it, so I am looking for any NFHS rule that can back me up. I looking in both rule book and case book but could not find anything.