Just like OW card, no card no dive...for whatever level the dive requires.
If a DM observes someone being a destructive idiot they’re benched for rest of the trip. And if you are a total ass causing mega destruction you get a fine, just like if you’re caught off trail in a park causing destruction.
It’s amazing how people will straighten out if there’s money and fines involved.
Money IS involved. Dive op money. That's why you seldom see this because the diver would just take their dollars elsewhere. I do think the "tornado with fins" needs to be sat out but if you get a rep for doing this too aggressively then you'll get less bookings. Many divers are not very skilled divers but not obnoxious divers either. Most need a little education and encouragement not chastising and punishment.