My parents have some relatively new neighbors who own a pair of really big, really obnoxious dogs. If you go anywhere in our backyard, these things start barking ridiculously loudly and just won't stop. My dad has had enough and is about to take matters into his own hands.
In my dad's own words, "The way I see it, I have two options: I can either make them an offer on their house or poison their dogs. I'm going to go over this afternoon and see which one they'd prefer."
If you know my dad, you know that he's 100% serious. In case you're thinking that my mom is normal and balances out my dad's crazy, let me assure you that she is not. Her only reaction to his comment was to warn him not to be too confrontational.
I'm no expert in threatening to kill a neighbor's dogs, but I'm pretty sure "confrontational" is a given.