
No engineer would create a screw with a round profile thread,
The only point I could see of a screw head like that is one that is destroyed on closing.
( , Tue 14 Aug 2012, 17:07, Reply)

The screw has a head like a straightened-out cam so that you can tighten one with a flat head screwdriver but need a special tool to loosen it. This is pretty much why I figured it was a hoax: there are less moronic ways of making one-way screws.
( , Tue 14 Aug 2012, 19:15, Reply)