As a renter I've found the neighbors dump the beer cans, their shitty trailers, and whatever other bad habits they have in my yard because they know the landlord is off in another state and everybody who lives here for 2 years and then moves on has no rapport with the authorities so it can only hurt us if we try and do something about it. The landlord is an old man who basically does 0 maintenance to the house, so the house is slowly turning into a pile of garbage that an unmown lawn actually look more fitting with.

If you want to know why we don't bother, it's because the owners of the surrounding houses use our place as dumping grounds and the owners have been there for decades and know all the housing inspectors and police. It seems pointless to even bother when the landlord wants the house to fall into disrepair and the neighbors will use their connections to authorities to dump on our grounds again as soon as we clean it up. On one occasion I was sent a notice that I would be imprisoned because of trash my neighbor put somewhere not even on our property and before I even moved in. I dutifully cleaned it up because it was clear I was going to be framed, but as that took the entire weekend I had little energy leftover afterwards to do yard work around my own place after being exhausted dealing with the neighbor owners.

Meanwhile the neighbors' house indeed did look spotless because they dumped all their trash on the renters' yards.