Um... yeah because I paid a ton of money to have some guy next to me scream the lyrics and unintelligible yells essentially in my ear. I get it, you’re excited, you scream like mad when something epic happens, and applause is great and feeds many performers...
but mid song? Or during the quiet moments in tracks? Nah. Those people are assholes. Sorry.
Maybe, just maybe, it’s not the guy running the soundboard.