Well I suppose if you want to improve your chances of injuring, maiming, or killing yourself, that's a good way to do it.
It probably goes without saying that his method of valve installation/removal probably isn't an approved method. Cylinder valves have torque specs for a reason.
Speaking of torque specs, burst disks also have them. The amount of torque will impact at what pressure the burst disk ruptures. Install it too loosely and it won't rupture at the proper pressure.
Overfilling a CO2 tank can cause over-pressurization. This graph illustrates it best: