Good one!

Back in the old days before smartphones and ebook readers were all the rage, techie types had PDAs. PDAs were about the size of an iPhone and were uber expensive for their day. Much more expensive than an average reader today if you adjust the price to current monetary value. Almost weekly I would read of someone crying over their broken PDA because they kept it their back pocket, where it would easily fit. Front pants pockets are not as bad, but front shirt pockets are if you don't have a flap or button to keep the device from falling out when you bend over to tie your shoes or something. I have dropped a lot of stuff out of my front shirt pocket when bending to far forward, but luckily haven't broken anything yet.

I would also be careful with coat pockets. If you take the coat off and toss it in a chair, you or someone else might accidently toss something heavy on top of it.