Unsportsmanlike Foul?

[Adam]

I'm not telling them to stop yelling shot. Unless you're going to tell the girls to stop yelling "Ball Ball Ball Ball," or "Dead Dead Dead Dead" (when a dribbler has used up his dribble), there's not much help from the rule book for telling them to stop yelling "shot." Even then, I'm not sure you can get there without some rulebook gymnastics.
that said, if other officials in your area aren't tolerating it, then you're on more solid ground than I would be. If they are tolerating it, then you may want to reconsider.