I agree, I have some home made ones out I do not take down, but if I pay $200 + for a stand, you can darn well bet I will be keeping a very close eye on it. If someone takes one of my home made ones, I wish him well. If I leave a $200.00 temptation out there, and it gets ripped off, I guess I will blame myself first, and keep an eye out for whom ever took it.
I also mark all my purchased ones in a manner and place that cannot be removed or covered up without being obvious. Now if I leave one up far a few days during season, and it gets ripped off, you can bet I will be hot. I guess I figure we owe it too ourselves to take care of our stuff first. If we leave it around tempting others with it, at some point in time, it is much our fault as theirs.