Your math is absolutely wrong... You cannot be mad at the Dive for other peoples illegal behavior. If you want to be a realist and say this behavior is what people do, that fine. But legally the Dive takes up 2 large boats worth of space on any given sandbar.
Unfortunately, that pic (and my boat is in that pic) was taken on the 4th of July a couple years ago and shows a whole lot of illegal rafting in Braun Bay. This is nothing new.
It because of this kind of rafting behavior, that when I get to (insert name here) sandbar, I take pictures.... so that when people anchor too close, I have my proof (for a judge) that I was there obeying the law, and that I am in no way responsible for other peoples behavior. This is also how I know how the NHMP measure distance between boats.
Woodsy