Neighborly disagreements are certainly nothing new, and they're definitely not uncommon either. To be honest, if you've never had any issues with the people who live next-door, you're one of the lucky ones.
The rest of us know that these kinds of problems can happen any time over just about anything.
Did your leaves fall over the property line onto their lawn and you didn't rake them fast enough? Well, you're going to be hearing about it. Did their kid's hockey practice in the driveway result in a puck through your living room window? Yeah, it's time to go talk to the neighbors about that.