I agree with you all. @Gabe yes, it's probably one of the rougher beaches/areas, and does attract a certain crowd, but there were families there, trying to have a nice celebration with their Moms. There's a certain mentality also of going to another person or group's 'turf' and starting something, an invasion of sorts, as if there's anything to be gained from acting like idiots.
It's unfortunate when people are bored, have time on their hands, and are looking to cause trouble. I wish more felt the need to be productive citizens, imagine how much better this world could be if that were the case @lushlala.
I actually hadn't even considered alcohol @DancingLady, because I think it used to be prohibited there (not that that would stop this sort), although that may have changed, but no doubt you're right about that.
@PhilosophyDaddy, Yes, no doubt they have been bragging about it to their friends, as well as on social media. Such a sad statement of today's young, and oftentimes, unfortunately, those who raised them.
I certainly had my years of drinking (most often responsibly) when I was younger, but I can't imagine acting like this, not only because I was raised better, but also because I'd have had to face the wrath of my parents. It seems many these days don't have any consequences for their bad behavior.