Just this year I was AR for a CR who is currently on TV regularly waving flags at MLS games. I popped my flag in one of these situations. It was nowhere near as extreme as yours, but it did share the characteristic that I was the only one in the stadium who knew it happened. The CR blew his whistle (reluctantly IMHO). At half-time, he explained to me that the game simply doesn't need those sorts of calls. Something like, if the players don't expect it, you don't need to give it. (I didn't have the balls to ask if he actually did that in MLS games.) We agreed to disagree.