this is an accident waiting to happen. As soon as you plug a second device in there you will end up frying one of them. all you would have to do is add a ground location and separate the contacts based on the ground and then you would have no current cross over.
Just because it isn't safe doesn't mean people won't want them... I want a flamethrower and that's not safe. Mind you that's a slightly different form of not safe.. Alas people will want this because it is cool, even if it's not the most well thought out/safe invention.
Nice design, but it can be very dangerous when there are so many plugs in that outlet because there is no limit sign. And one more thing, the grip of the outlet can lose its strength when other codes come into the same side.
i don't know what to say...but when it involves electricity, they should consider the safety first....at least a warning on that wall socket for how many plugs allowed and what kind of appliances suitable for it...and it is useless to talk about ground terminal if you want to put 100 plugs on one outlet...rather, you better check circuit breaker's condition at the main switch...