[noodlesUK]

Idk if OP is the person who wrote this, but on my device the red text about not turning the microwave on is not especially legible. I’d probably make that text a bit bigger and/or brighter. I expect most HN readers will know not to microwave a phone but you’d be surprised what people might do.

[defanor]

Indeed, it's generally not considered legible on any common devices: WCAG suggests to ensure suitable perceived contrast ratios [1], and there are checkers around [2], while this page's #f00 on #36393F is far from meeting those.

For the safety's sake, might be nice to also recommend to unplug the microwave oven altogether as the first step.

[1] https://www.w3.org/TR/UNDERSTANDING-WCAG20/visual-audio-cont...

[2] https://contrastchecker.com/

[dijonman2]

In dark mode it’s very legible. I expect most people know not to microwave their phones except maybe children.

[leaflets2]

> 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.

[defanor]

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.