'WN said:

Even if it's not removed, well, my neighbors are very nice people, but they're both elderly (in their 80's) and not in the best of health. While we don't know when, um, the inevitable will happen, it will happen. Or their kids may place them in a care facility. So the day may come when other circumstances, shall we say, remove my permission to use the tree or what's left of it.

Magnet wire supported with fishing line is invisible. Problem solved.