The new neighbors, been here a year, he always mows twenty feet over onto our property. He knows where the lines are, the markers are in plain sight and he's seen me mow on the line many times, I've been here 31 years. It bugged my wife but not me, she said I should say something to him, I gave her my points of view.
There is no such thing as squatters rights anymore, he can't take ownership just because he mows it.
It won't change how our deed reads or take anything from us.
So long as all he does is mow it, no harm done.
I don't care what his reason/s are, what thoughts run through his head doesn't impact mine.

And lastly, a man would have to be a damn fool to complain about someone mowing his lawn for him, he can mow as much as he wants.

She doesn't worry about it anymore.