We've all had them. Let's hear about them. I bet I had the worst.
My ex-neighbours refused to sort their garbage when the new garbage rules came in several years ago. Thus, the garbage guys would not take it. They brought it back and piled it in a skanky old van. When the van was full, it got piled against house. The pile grew and grew. Loose garbage all over the place. I often had to kick female hygiene items back into their yard. Every time I had a conversation with them, the truck was on the way to clean things up. Finally I called the city. They came almost immediately and gave the neighbours a day or two to get that mess cleaned up or suffer a huge fine. They also made them remove the junker van. Of course, the neighbours were infuriated and would bad mouth me, out of sight, hoping I would hear.
They eventually had the whole neighbourhood complaining about their dog too who they penned up in the back yard 24/7. The city also made them cover up an old car or pay a big fine. They did'nt think they had to make payments on the house and eventually lost it. Good riddance. They sure gave the term "white trash" meaning.