You could just as easily get zapped with a "potentially-lethal 340 volts" with Apple's cables. Notice how that fake charger has a USB port to allow you to connect your existing iPod or iPhone charger cable to it, including a genuine Apple cable.
(I suspect that the chargers with integrated micro-USB cable are, for the most part, quite a bit safer due to not imitating Apple and having plenty of space. I actually took a dirt-cheap Chinese 5V supply apart a while ago because it had died - proper controller chip and all the works, good half-centimeter of isolation between high and low voltage, slot in the PCB along the part of the isolation boundary where they're closest, etc.)