No more unsafe than filling a fuel tank on a vehicle. When is the last time the clerk wanted to see your driver's license?
But, yes. That is a different industry with a different norm. And the advent of paintball created a problem for this norm as paying customers had to be turned away for lack of a C-card. Suddenly, a waiver was good enough. After all safety is great until it starts costing rather than making money.
BTW, did you learn to drive from a professional instructor or from a mentor?
So you think that a self regulated industry is not a good thing?
You are right, some dive shops will fill scuba cylinders without a c-card if they are being used for paintball. But they should (I know they wont always ask but they should) for that c-card. It at least makes me think about who's cylinder I am filling. If I feel as though they are unsafe i wont fill it. I am not about to endanger someone else's life because I didn't care if someone was certified.
Why do we visually inspect cylinders and put a sticker on the side of it? I mean if we don't care if the person getting it filled knows how to properly use it then why do we care about the safety of the actual cylinder?
I was trained by a team of professional instructors.