Highnoon-
The extra paperwork is not a real hassle for the legitimate firearm owner, but it does cause problems for the shop owner, if they make the slightest mistake in the paperwork, or are in any way late lodging thier paperwork with the police- Mr Plod tends to hit them like a ton of bricks.
However, if (actually when)

our police make a mistake with thier paperwork, lose documents, misinform applicants, stuff up applications, lose applications, lose firearms licensing records (thousands of them), and generally handle thier paperwork in a slovenly manner- we are told to harden up.
Like I said before- crims dont bother following the rules- thats why they are crims.
They will- and do- buy from the black market (which is thiers anyway) all the stolen, illegally imported or illegally manufactured firearms and ammo, drugs, chemicals and explosives they want.
My choosing to follow the law will not affect them in any way at all.
stephen