I've never given polarization any thought and never had any problems, so I don't buy this being an actually a problem in practice. That's probably because a lo

I've never given polarization any thought and never had any problems, so I don't buy this being an actually a problem in practice. That's probably because a lot of equipment is double-insulated now so polarization doesn't matter, and manufacturers are better at getting the polarization right. It's usually when someone (incorrectly) replaces a cord themselves that you run into issues, which doesn't seem to happen much nowadays, the lamp with the bad cord goes in the trash. Though I've certainly run into home outlets that are wired backwards. Probably the most likely place you'd run into problems with incorrect polarization is when changing a light bulb. If the polarization is wrong, the outer threaded part of the socket will be live, and you've got a good chance of contacting it while changing a light bulb. (which itself is becoming a rarely with long lasting LED bulbs, or LED lamps without changeable bulbs). Though this is probalby more the fault of the Edison lightbulb socket than of the polarized plug.