I 1000000% agree.
I have had this happen many times. Also last month I accidentally deleted nearly 4 gb of some of my most important files when I highlighted a few icons on my desktop and unknowingly also highlighted some icons in a Fence that was "hidden".
There should be a way to lock the icons from accidentally moving them from the fence. If there is already a way to do this, please tell me how.
I will never be able to replace those important files, but I would at least like to have confidence I wont make the same mistake again.