No, they don't care.
But, PadI is not in charge of the waterways and navigation/enforcement thereof either.
I am familiar with exactly who you are talking about and I have been exactly there and I know that those guys are purposely being horses rears and you can bet that the guy your with does the same thing --betcha-- when it is his turn. First, the river is not wide enough to steer clear of divers by the typical 100 to 300 feet. They are instead supposed to move ahead prudently. Your being aware they are there also requires you by the "law of self preservation" to participate in the equation by also steering clear of the jackarses in the pontoon.
The thing that makes me really angry about all of this is that these people would rather hit you and kill you, your child, your buddy than give a inch for a human life and now you know why they run down manatees, Flipper, divers and whoever is so unlucky to get in their way. I predict one of these days a Glock swinging diver in Florida which has stange "castle laws" will decide they are being threatened and open up and then of course probably recieve return fire. It is a real shame that people do not know the value of life or even how to behave anymore.
My advice, be nice, stay low, stay out of the way, don't get in any shouting matches/confrontations with low life types and just do your best to have fun in your own little world--that is what I do--I bring my own little world with me and ignore the "bad" people, including at least a few on this board. Yep, I yield for jackarses. It is the only thing we can do, not just in diving but in life, it is the way things are. BUT, like my grandmama always said, when evil comes looking, the good will be allowed a reckoning.
N