Personally I could care less, I have better things to worry about than a team taking two steps through my dugout. If you are looking for something to get wrapped around the axle you can always find it.
She was mad that her team lost and decided to take it out on someone. People get wrapped up in a lot of bs. I've been around softball and baseball for 14 years and I have never heard this "rule"I thought this was the case.
I saw this at a tournament this weekend for the first time. The losing team's parents were fairly mad about it, yelling at the coach for being disrespectful. There was one mom who pretty much lost her mind over it.