I have. Especially one who was coaching his son while he was hitting. He told his son to not listen to me and bunt the ball like I wanted. The son must have told the dad all of our signs. So, he hit the bench. That was my first game here as a baseball coach many years ago. The point was made.
At least in that case, the kid ignored your sign, so it's a little easier. And you send the message that you, not his dad, are the boss during baseball time.
I'd have a harder time benching a kid who is working hard and following the rules because mom wouldn't leave me alone. It may be the right call, but it wouldn't be easy.
Maybe we should start using fundraising money to hire bouncers to physically eject problem parents from the premises.