>>44047
I've encountered one at relatively low level around here. My last job was a startup out of a guy's house, and we had a drone grazing the neighborhood, particularly in our area. Though it did spend most of its time up high, it would sometimes descend to around 50-100 feet. In retrospect, I don't think there's a reason for it to have flown at that altitude unless it was trying to see into people's back yards through the trees, which likely would have been very difficult at a high angle, because of the way they hang over.
We eventually chased it down to a nearby park, and our best guess was that the people who took it were plain-clothes police, based on the way they acted and the cars they drove. The police department here is exceptionally well-funded and has that sort of thing, though they haven't historically been the brightest bunch, nor are they on the straight and narrow.
It's worth noting that my employer at the time was a former military computer security expert, and was once involved with Halliburton/Northrop Grumman types. He was highly paranoid for reasons relating to this, and I'm 99% certain that he was also involved in other, less legal ventures in the time that I knew him, so I've wondered if the drone was meant specifically for him.
Of course, it's also entirely possible that it was just shitty hobbyists who don't value or respect personal privacy, but it's made me think.