Re: Interesting: USA (etc) flat prong version recalled many years ago
US type mains plugs are probably safe with USA's 120 volt supply, despite the naked prongs.
Use in Europe (230v supply) is potentially lethal. I remember reaching behind a hifi amplifier to remove a US style lead from the auxilliary mains socket and getting hefty shock because the pins were still live when removed far enough for a finger to touch them.
Since then, US style sockets were sealed on equipment imported into UK and have now largely disappeared.
Modern auxilliary sockets (for what are called loosely called kettle-leads) are safe and present day European mains plugs have plastic covers on the prongs, as per pictures in article.
The main danger with UK mains plugs is treading on their upturned prongs in bare feet. That feature of their clumsy design actually caused me to break a toe.
Of course, Apple making stuff so badly that it breaks in normal use would be scandalous. I've had the case come off a third-party charger when simply removing it from the wall socket, exposing the live innards still plugged in.