I'd love some of them in the Caribbean, but for protecting the reef, not the divers.
It would be really cool to have a cop sneak up on some moron trampling the coral, demand his C-Card and punch a hole in an "I Was Stupid" check-box right on the card.
After two punches, the card would be invalid.
Terry
Nah, no need to make them carry a card. Put the i was stupid check boxes on the regulator hose... I guess you only get one check there