|>>|| No. 28040
It's more the mechanical loads that offend me. Mains sockets are only designed to have plugs and their dangling wires hanging from them. These abominations add leverage where it's not expected, and unwelcome loads if you trip over the cables. If all you have is a regular plug, it should pull free before damaging the socket. With these abominations, that's not the case.
If you're just plugging a couple of chargers in, then meh, but if you've got trippable-overable cables, or a couple of fan heaters, then fuckno.