I've noted chrisjc33 explanation, is this a common practice

I would think a hacksaw blade between the handle and the door is another option...No
I've not came across the clever crim' yet

I know but, but with all this 'press coverage' it can only educate the common NED

who will progress from the clay spanner.
I'm sure 'I'm telling ma da how to make waines' but would a spinning washer on the fixing bolts help
G