Come to Greece they piss anywhere they like or take a dump come to think of it I do, it seems its a Greek custom. But for you I would not take any notice, when you have to go, go, try the sea next time.
Don't worry about. When you got to go just do it. Just trying to hide it the best you can. If they have a problem just ignore them. I have seen people piss without even trying to hide it so don't worry.
My first reaction when this thread pops up is, 'Have you tried cranberry juice?' There, got it out of my system. Hehe, phrasing.