[jdietrich]

My grandmother once jammed a USB-A plug into an RJ45 socket. I needed large pliers and no small amount of cursing to remove it.

Note to self: do not tell an elderly person "don't worry, you can't plug it in wrong, the plugs will only fit in the right sockets".

[imhoguy]

Long time ago I jammed headphones minijack into USB-A of tower case computer - you know, one with ports so low just above the floor. There was a spark and the computer powered off instantly. Thanks goodness it powered on fine and the USB port was still working fine. To this day I hate audio ports next to USB-A in some laptops.

[ebg13]

I assume you meant type B, not type A, but anyway, lol. I had a somewhat similar "bad advice that always used to work" experience recently with someone, except this case was a proprietary USB-to-10P10C cable for APC UPS control, and they thought it was a USB/Ethernet adapter. Of course 10P10C and 8P8C modular connectors are exactly the same size and shape.

[jdietrich]

Nope, type A. Both connectors were damaged beyond repair. I wouldn't believe it if I hadn't seen it myself - that woman must have the grip strength of an enraged gorilla.

[watersb]

The RJ-45 socket on my MacBook was right next to a USB-A socket. I once inserted the USB into that Ethernet port, no jamming, and doscovered that indeed they are almost exactly the same width.

It wasn't stuck in there. Hmm.

[technofiend]

I've actually seen someone plug in a DB 25 upside down! Every pin in the male connector was bent and the metal hood which mated with the socket was flared out.