Perspective: There are MILLIONS of annual visitors to a place like Yosemite. MILLIONS of people trudging around on foot, disturbing the environment, leaving behind trash, tossing coins in geysers & springs, removing things, making noise, etc.. Only a tiny fraction of the public has a drone, & an even smaller fraction visit a place like Yosemite. Maybe a few thousand flights a year? Granted we don't want drones flying over huge crowds of people, but a drone flying past Mt. Rushmore is hardly placing the public at risk. Personally I find the buzz of a drone much less annoying than that of screaming brats. This is a typical idiotic government overreaction to a non-issue.