You've probably shelled out a lot of shekels for this show. Maybe the performer is one of those quiet musicians whose songs sound almost like lullabies, and said lullabies are lulling you into a state of transcendent relaxation. But then you're suddenly jerked back to reality by some yahoo roaring "Freebird!" or by a group of insufficiently reverent teenagers gabbing right behind you, or a boomer with low blood sugar desperately opening a bag of snacks to your right.
The nearly automatic response of any concertgoer is to issue a stern hush. And typically, other concerned citizens join in. The problem is that in short order, the hushing becomes so loud it drowns out not only the offending noisemaker but also the music you came to hear. Hushing is a weapon to be used with discretion and delicacy because it so quickly morphs out of control into a theaterwide wall of susurration.
Keep this in mind the next time you become deeply annoyed by some cacophony in your vicinity. Try to lighten up and do your best to focus on the music, not the chatter, the crackling wrappers or the calls for a classic rock anthem. After all, you won't add to the problem if you just silently resent them.