Anybody else remember Debora Green? Back in 1995 she burned her house down, with her kids in it. That was in the same suburb I grew up in. Actually, not too far from my house. Or the school I was going to at the time.
One day Sis had had a REALLY rough night the night before and couldn't sleep. She finally laid down about 4AM. Sometime around 6, there were sirens all over her apartment complex. One of the buildings burned down. Nobody was seriously hurt, but she was so zonked from not sleeping that she didn't think to call anyone in the family who recognized her apartment complex on the news, and her phone was on silent. Turns out someone decided to smoke from their balcony and just tossed the butts off the edge. Caught the bushes on fire, and due to how dry it was, the whole building was gone. They never rebuilt it.
A few years back I was driving to my best friend's house and one of the houses on the block was just a burned shell. There was police tape everywhere and a handpainted sign on plywood in the front yard that said "Family is FINE, please do not contact us right now." The foundation is now gone, it's a nice plot of grass. I still never figured out what happened there.
When I was a young girl, I had a friend down the street, "Charles". He was a few years younger than me, but quite intelligent, and his dad loved entertaining the neighborhood kids. Nothing creepy, he just loved seeing his kid getting along with other kids, even if they were a bit older. I stepped outside one summer day and told dad I was going to Charles's house. He was looking straight at me and nodded, so off I went. Charles and I were playing in the basement when police came to the door. It turns out they were doing a door to door search of the neighborhood search for me. Charles's dad had to go somewhere and he had told the babysitter that Charles was in his room, probably napping, despite him having been told by both me and Charles that we were going downstairs. She didn't actually check on him, he had been downstairs with me. Neither of our dads had heard us say what we were doing. So yeah, THAT was a good shakeup of the neighborhood.