Noisy Neighbors

So as you may know from my previous post, the weather has been really nice and warm here in L.A. And for us, this leads to a lot of noise.Let me explain further. You see, we live right by the pool in our apartment complex. Ground level. Right next to the pool. Up until today, we thought that living right by the pool was wonderful, because of the fantastic view of the trees and all of that. And it is, except for that one little problem. Noise.
So today, all of a sudden, people start to come out of there homes from nowhere, and suddenly, there's water splashing, kids screaming, people laughing, babies crying; it's just so much for your eardrums to take in. I'm pretty sure it's worse because it echoes in our courtyard.
I was actually really startled when the first family (of probably around 10) came and started making a whole lot of noise for about 4 hours straight. And not only is there a noise problem, there's a privacy problem. We have our balcony door open (because it's so hot) and the kids start looking into our house, which is extremely annoying.
We were so relieved at the peace and quiet when the family finally left, but of course, the next family comes marching in, making the same infernal racket. And then the next family after that. And the family after that. And the family after that. And so on and so forth.
It's really quite a big deal for us because we live in a very sunny place, where the weather to swim is perfect.
I would really love to put up an "Annoying Noises Prohibited" sign right about now...