I’ve seen this at plenty of venues. It’s harmless and the upside is it brings the energy up.
Y’all know we’re talking about cheerleaders, right? They’re already at every game telling fans when to cheer. They aren’t pointing guns or “shaming” you if you don’t follow their cheers. Not sure what OP is worried about?
But the Eyore’s on this thread make it appear like we need this more than we know.