Here's one I just remembered... not terribly proud of it but what the heck... years ago, there was a new tenant in my apt. building. He was 19 at most and apparently thought since his mommy paid his security deposit, he could do whatever he wanted. Well, I put my kid to bed (she was only a baby then) and then this yahoo came home drunk with a passel of friends and proceeded to make a heckuva ruckus in the front yard. I went down and asked them to calm down or xxxx off... him and his 4 pals had beer muscles and encouraged me to do something about it. Okay, fine
(This is the part I'm not so proud of) I went back upstairs and selected a nice spare guitar neck (I used to build and customize guitars). Bear in mind, this was a select piece of curly maple with a steel truss-rod down the middle of it, not something I'd want to be thumped with... went back down and asked them if they were ready to shut the xxxx up or leave... they scattered.
The cops showed up not long after, said some "poor innocent kids" had called in, saying I "threatened 'em with a baseball bat for no reason" and could they look around my apartment for weapons? Yeah, no problem, I let them in and showed them the drawer where my knives were. Also mentioned "keep your voice down, officers, my kid's asleep." They never looked twice at the stack of necks and other various guitar parts in the back room.
The dipstick kid was evicted by the end of the month for various other reasons.
Moral of the story? I probably shouldn't have gone all vigilante... but well, y'know. My daughter slept through the night because I spooked those xxxx-heels off the block. I asked 'em nice the first time, but... I'm not one to ignore idiocy or suffer fools gladly, and dang sure not one to be intimidated by punk-xxx kids. No one got hurt, so it's all good. In my experience, cops have mostly been pretty fair to me.