A few years back, a couple of helicopter guys started flying at the elementary school that's just across the creek from my neighborhood. My neighborhood has at least 3 modelers in it who work on their models most evenings after work. Which is when those trespassers were flying next door. I call them trespassers because that's what the police called them. They didn't have permission to be on that property and certainly not to fly on it. So one evening when one of their choppers hit one of the expensive lights in the parking lot, the school principal asked the police to come by more often. And the police caught the guys a couple nights later. The guys claimed it wasn't their fault because the helicopter had gone crazy, no fault of theirs. One of the cops who responded to the tresspass at the school call flies R/C. We got the story from him.

The school took damage. The chopper guys took damage. At least one chopper took a lot of $$$ damage. And the hobby took some damage.

Beginners often don't know all the reasons for some things.