Oops....I didn't finish.... anyway, this morning I found a bottle cap from one of their beers in our back yard on the lawn

. This really pisses me off b/c first of all,and most importantly, Max tends to put everything in his mouth, and since I've found other usually inedible things in his poop, it wouldn't surprise me if he picked something like that up and swallowed it

. Along with the fact, that it's annoying as all getout to have them tossing their garbage over into our yard

.
So, if it were you, would you say something to them, or just let it go? Is there a way to find out who owns the house? I don't want to make enemies of these guys, but I don't want them or their friends doing this stuff. It's bad enough to have their yard be trashed, but I don't want ours to look like theirs! And I definitely don't want Max getting sick or injured!