Yep, safety is an issue. They're not as easy to control as someone who's never flown anything might think. And a lot of people who've never flown anything before, got cheap little drones for their birthdays or holidays or whatever. I've got a friend who's been doing RC aviation for some time now, whose new hobby is posting ads from people whose windows have been broken, and counter-ads from people searching for their lost drones.

As far as privacy though ... ever look at Google Maps and zoom in on your house? Even out in the country there's high resolution aerial photography, and up until very recently, all of it came from full sized pilot-operated aircraft. Yes, UAV photography is gradually putting pilots out of business, but it's not like we don't have planes and helicopters flying over our house all the time, 15 miles from the nearest town with population higher than 500.