on my next door neighbors who let their dog run free around the neighborhood, especially at night.
i'm mostly afraid that he's going to get into it with my dog when i'm putting him in the car to go to the park or something.
he isn't what i'd call aggressive, but he's high strung and territorial. (and his territory seems to extend to my front yard)
so far i've managed to keep them apart, but he's gotten closer than i'm comfortable with a couple of times, and he really shouldn't be in my yard at all.
the trade off is, of course, pissing off the neighbors if they find out who did it. i'm also concerned that he might end up being euthanized or something.