He was sitting behind home plate and shouting "STAY BACK" on every change up, yet he was quiet as a church mouse on every other pitch.
I don't have an issue with a player on 2nd revealing inside/outside on a pitch to the batter. You just have to be prepared for the consequences if you get caught. What I have an issue with is coaches or fans stealing signs and using technology, AKA the Astros or NY Giants, to gain an unfair advantage.
DD HS's team played a game where a parent (opposing team) was yelling inside/outside because DD's team catcher was setting up super early.
It was an away game and the attending Athletic Director went to the parent and asked them to stop. So I'll give them credit for shutting it down.