"Security screws must be a near pointless exercise as security bit sets are so widely available that every tinkerer must have a set."
So true ! I think I paid about GBP10 in Aldi a few years back for a boxed set of bits. Must be over 50 in there including some weird & wonderful ones for fasteners I've never seen.
One annoyance though is when the designers place the "tamper-proof" fastener deep down inside a narrow hole as on most of my 2 stroke garden machines. The extension pieces for the bits/sockets are always just wider than the deep hole : – (