Well, yes, sort of. It's not that not getting cheered is hurtful to others; but rather, that the asshats who whoop and holler at events like this are ruining it for everybody else.
It's not "free speech" that's at issue, it's just manners. People used to understand good manners -- more and more people these days do not.
Yep. At sporting events, they're now starting to cheer halfway through the National Anthem. If I was the singer, I'd just stop singing until everyone shut up -- I'd also have a few words to say.