Whatever passes over the property line is yours, for better or worse. You can trim the trees and eat/use the lemons. Also, if a hurricane comes and the tree falls over and destroys your fence and breaks your lawn furniture, that's your problem. Also:
Immigration is a civil matter* not a criminal one. So no rights need to be read, especially if you don't have an actual warrant, or if you have a mask. *Getting executing during civil matters is getting to be more common these days. Checkmate, lib!