While most neighbors are respectful of other people's property and keep their pets on leashes or out of other people's yards, outdoor cats are known to roam. Hunting for rodents, lying in the sun, teasing dogs, climbing trees and rooftops--cats with free range of a neighborhood are little wannabe lion kings. Usually the worst thing that happens is you find a few bird or mouse corpses on your back porch, but giving your cat full freedom can sometimes be incredibly dangerous. Cars, stray cats, or other animals can be a major threat depending on where you live, and unless you can keep a constant eye on your pet while they're outside, you might have to deal with some feline-related destruction of property or finances.
So, when a frustrated dog owner decided to consult the moral compass of the internet otherwise known as Reddit's "Am I the As*hole?" about a condlict over their neighbor's cat, people were quick to deem a verdict.