There must be some counter-argument to what I'm about to say - in fact, I'll see if I can think of one myself, but one of the guys on our team wants to change the reg on his PMI bottle for sponsorship reasons.
I understand the PMI point about not wanting monkeys to arse about with time bombs, but when the bottle does need testing, I understand there's a chance the threads may be fouled from the loctite anyway?
So, it seems to be in addition to the airline argument, there may still be other reasons people wish to remove the reg?
Counter-argument: Don't remove reg from bottle A, just buy another bottle B
Counter-argument cont: Why should I have to? Other 'dangerous/please don't fiddle' fittings aren't loctited in
Counter-argument cont: If you don't like it, go buy another brand of bottle - market forces, etc
And so on and so forth...