I bought a lot in Chandler, AZ in 1985. The lot was irregular and I had a hideous house behind me. While laying out the land for my house I came to realize the guy behind built his dump 10’ over the line and was using my land.
I immediately called him on it and he just blew me off. It wasn’t until I told him I had hired a bulldozer to clean my lot that he got in gear. It cost him a bundle to make good.
He eventually snuck out in the middle of the night an disappeared.
He obviously had it in mind to claim my lot by AP and increase the value of his 3/4 acre. Didn’t work.
BTW, for all those who complain about this law, it has been a part of property law since the 1400’s. Property law is probably the most settled area of our laws.