Unfortunately not. They can get in trouble for verbally distracting the fielders and draw an interference call against them, but not for yelling during the pitch.
Sounds rather bush league, but not much you can do about it.
As my DD team has progressed through the years and moved up in age group and in level of play, it has been fun to watch how the older, higher level teams have an "act like we have been here before" attitude from the players, parents and coaches....