[JRutledge]

Unless they yelled something that was profane or inappropriate, then I cannot see someone yelling alone being a foul? Intimidation on its own is not illegal and as long as players are not taunting, I really do not see the problem. It sounds to me like you are trying to find a foul rather than observe one. Leave this alone unless there is something solid you can back up such an action. Because if I was your assignor and this was your story about the play, I would be a little concerned. If yelling at a player was automatically illegal, then I would think yelling "ball, ball, ball" would be illegal in football or basketball from the NF. Do not be a plumber.

Peace