You really need to stop replying to every reasonable comment pointing out a very real risk with all this ignorant nonsense. You know not a thing about air flow on that roof (or anyone else's), and you seem to be utterly clueless as to how powerful even mild gusts of wind can be. Trying to convince people they DONT need to take reasonable safety steps, even when presented with knowledgeable arguments that are clearly better informed than yours, is incredibly irresponsible. Please reconsider.
Look, there is a reason why people secure stuff on rooftops. What are you arguing here: That it's okay to leave shit around because the chances are low that it will kill somebody?
No, I have no problem saying securing stuff is generally a good idea. If nothing else it makes it harder for someone to steal it.
My point is the specific bad thing described is unlikely to happen. And sure I got a lot of knee jerk reactions but nobody actually did any kind of meaningful calculation demonstrating an issue.
It's not a knee jerk reaction. You have limited view of the problem. I've lived next to a three building being constructed as a kid. The amount of stuff flying is unreal. You aren't accounting for cats, earthquakes, determined birds, malicious intent, gravel under the panel+wind, strong rain that may move the board and angle it.
Your sole argument is, historical wind speeds won't lift it. That is not realistic, naive and outright dangerous thing for which people actually get badly hurt or die.
But, I don't see you slowing down in this thread, so I doubt safety concerns will reach you.