The 'Original Apple' item shown at the bottom of the post doesn't look as if it fared much better though. The magic smoke definitely came out on that one and whoever owned it was lucky it ended there and didn't end with an actual fire.
It could also be the Apple charger's design that makes it able to handle shorting of components without posing a hazard to anything other than itself.
Apple's own charger follows safety standards. It might blow up, but it won't take your laptop with it.
Upthread there is someone saying that their Apple charger set fire to their carpet, and the only reason why it wasn't worse was because they were in the room at the time to stop it.