Evil unremovable screws

Latest addition to the arsenal of "security screws" ( i.e. customer-unfriendly screwheads ) is this treat from those bastards at Belkin.


Cleverly designed so that it can be torqued into place, but attempting to rotate the head anticlockwise to remove it results in the screwdriver's blade riding up the "ramps" and out of disengagement.

Remind me not to buy anything from Belkin ever again: apparently they hate their customers and don't wish to allow them to do something as simple as fitting a longer flex to a power strip.