I grew up in the US and I’m back here now and never go to the beach. It’s 100% normal and expected there and I never second guessed it. I wonder if it’s an American cultural thing that’s spreading with these responses?

In the US the only question I’ve seen is who was there first and if you set up next to someone too close who looks like they extra wouldn’t appreciate it. Generally people sleeping or reading sort of a thing or if they have their own event set up setting up too close. Definitely avoid anyone with a baby. If someone asks them to turn it down or pick a different spot though, at least if the beach isn’t totally packed, that’s almost always respected and a non issue. Totally packed beaches can lead to friction though but most side with the music bringer.

I saw a lot of people asking others to turn music up, thank them for going through the work of bringing a set up, asking to join or moving closer to the good music.

When I’ve seen people be rude to people because of their music, get mad when they showed up later or if they had other places to set up, most of the beach would give the rude person the stink eye and think they were entitled and they were the inconsiderate ones ruin peoples day when others were enjoying the music.

Don’t know if it’s the entire US, but if that’s spreading through TikTok, tv, or whatever, it might not be inconsiderate it might be oblivious that the expectations and norms are reversed because they saw the American ones.