At first read, I shuddered .... I haven't ever used Nextdoor, and I did notice your proverbial tongue-in-cheek, so I'm hoping for the best on your behalf.
The neighbors to the North are drug guys, and literally "screaming queens". They have parties (very loud, many guys) regularly that draw the cops attention. I've never called the cops on them, since I have those thick, double-paned windows, and I tend to go with the "live & let live" agenda. One of their "extended-stay" regulars hanged himself from a light fixture a couple years ago. Seemed like a really nice kid - I even helped him fix his car once.
The neighbors to the South are a pair of intensely "private" guys, and very quiet, but they do peek over the fence when I'm using the "outdoor" sling in the back yard. That part I couldn't care less about. Neither of them has a snowball's chance.