Tough call, if team A has put in a bunch of second team freshmen and team B can't stop them then B is as responsible as team A. The problem lies when A has put in the reserves it is usually so far out of hand that B has put in reserves as well and the beat down continues. One thing you can not do is ask a kid to not play hard!! What ever the level or team be it starter or fourth team one thing you always do is try to get the most out of your kids.