> I expect most people know not to microwave their phones
I think you're vastly underestimating how little people know. A friendly FYI: seems you're in some kind of a bubble.
Personally I didn't learn about don't-microwave-metal (incl phones), until I was about 20 -- and at that time, I had already been studying physics at university for a year, and knew vastly much more than what most people ever will. I wouldn't say I was a child, at that time.
Be happy if people in general realize that photons and coronavirus aren't the same thing, although they're both small.
I wouldn't count on that: many things that seem straightforward, especially to an adult tech-savvy person if those things are tech-related, are far from that for others. And even tech-savvy people can be (and often are) careless, distracted/preoccupied/unfocused, making mistakes; I think pressing a "start" button automatically upon closing the door is something that can happen easily. Also as a rule, extra guards, safety measures, and/or warnings are good, especially when irreversible damage can happen.
Edit: actually there's an example of an unexpected mistake in this thread already, in the comment by hanoz. As mentioned before, listing unplugging as the first step would be useful.
I think you're vastly underestimating how little people know. A friendly FYI: seems you're in some kind of a bubble.
Personally I didn't learn about don't-microwave-metal (incl phones), until I was about 20 -- and at that time, I had already been studying physics at university for a year, and knew vastly much more than what most people ever will. I wouldn't say I was a child, at that time.
Be happy if people in general realize that photons and coronavirus aren't the same thing, although they're both small.