Youth sports can be an emotional experience. The physical activity of the kids can often spill onto the sidelines and into the stands and create strong reactions in coaches and parents.
For parents, it is important to separate their child's sports development from game emotions. For this reason, many leagues and coaches have adopted the "24 Hour Rule" which simply states that coaches will not discuss a game or situation until at least 24 hours after the fact. This important rule does two things. First, it moves the discussion away from the presence of the players. Second, it allows all parties to have time to put things in perspective and "cool off", if necessary.
If parents will respect the 24 hour rule, their concerns are more likely to be fully addressed in reasoned discussion. More importantly, the kids' enjoyment of a game won't be marred by an ill-timed confrontation.