My only close call was when I was asked to
film an event called "Hands Across the Sand" to protest offshore drilling, and another guy showed up with a P2V+ identical to mine. I didn't think anything of it until I thought I had lost control of my drone, but was looking at his, and had no idea where mine was since I'd been concentrating on getting a good video. I located it within a few seconds, but it was over the ocean at low altitude, had I kept moving the sticks trying to control *his* drone, I might have crashed mine. I've since decided to use a spotter whenever I do video of large crowds where someone else might show up with an identical drone.