Despite the fact I jumped into this sport last year and before I was kiting ...
Here in Bermuda there is only one rule, the guy before the last one in the water can't leave the beach until the last one is closer to the beach.
Remember, if something happens in the water, only another Windsurfer/Kiter may save your life so always respect other people in the water.
Just kill the sag ban on the jet-sky!

Last year one kiter smashed his head on a rock, almost 2 miles away from the shore and thanks to another kiter he was able to be seen and saved; then he spent 1 year in Boston in an hospital but now he is safely back home.