Sambo,
You should be kiting outside of the "surfing" (blue) flags anyway and I'm sure you are

If you need to go past flagged areas then the Life guards are quite happy if you stay out side of the breakers..... although seeing that we are classified as a vessel you should be at least 200M out from the shore line, i think you'll find that if you ditched your kite you're classified as a swimmer and if you did drift through a flagged area (out the back, i hope) the life guard would be having a really bad day to take it out on you.
The scary one is if your kiting on the open beach and a person enters the water that you now have the responsibility to move 60M away from them, unless you are travelling directly to the shore line and doing less then 6Kts, as per all other vessels.