I have seen people back in there with pickup trucks full of trash but were gone before I could get their plate numbers.
Those were probably just the guys stealing the copper pipes, the electrical breaker box and wiring, and the AC unit.
I have seen people back in there with pickup trucks full of trash but were gone before I could get their plate numbers.
Well, now you're changing the parameters. OP apparently doesn't care why the owner isn't taking care of it. And if my only concern were making sure it wasn't dangerous/health risk, I wouldn't either.
And, yes, rational people walk away from assets all the time.
I have a property next door to me that is apparently abadoned. No one is cutting the grass and the house looks trashed, it is full of trash and brush cuttings and there are (I believe) people squating in the house and on the property at times because a fellow is living in his car and he parks on the property. There are no lights on at night.
What would be the proper action (if any) to take?
More pictures.