And they don't have to know about the plants on your property.
When Gunsmith and I got set to build the garage, we had a surveyor come and double-check the property lines, because ...
and along came our former next door neighbor, tromping through the buffer-woods, wanting to know what was going on. We told him. At that, he became incensed, accusing us of all manner of unwarranted tree-destruction. I told him we didn't want to see him anymore than he wanted to see us. Did I expect that to help? Er, no, but it was the truth, and in retaliation, he told us he was going to clear-cut his buffer right up the property line abutting ours.
Yeah, boo-hoo; like we cared what the hell he did on his grounds.
We built and there's still a respectable tree-buffer between us and the folks that bought him out.
Some people just
know what's theirs is theirs and what's yours is theirs .... for the common good, of course.