I'm sure that Al would be the best one to put something together regarding rules of the road on the water. I completed the captain's class/exam in order to teach on an oceanographic research vessel when i was working in the keys. We, as kiters would be considered powered under sail, so if we were face to face with a boat under power (even a sailboat with a motor running) we would have right of way. as for swim area guidelines, hopefully Al can help us get that situated. He is extremely respected in his field and has a lot of knowledge to share. Lets check in with him before we go any further with designating our own "rules". HOWEVER, i think that Tom's idea of 100 ft from shore unless landing or launching seems pretty reasonable in the interim.
However, i remember last year after the college tournament, there were spectators at the beach specifically there to watch the guys ride and those same spectators were aware of the possible implications of being this close to a rider. If someone chooses to sit in the water with a camera and allow guys to jump a foot over her head with a hard board and big kite, it really is her decision and there's only so much the riders can do.
as for regular tour-ons (that's what we call the moron tourists in the keys), we must assume they are clueless and not get too close. just my two cents of course.