The scenario of needing to have a licence or at least understanding of the risks in kitesurfing is a plausible issue. However a Kitesurfer just like any other water sport or activity needs to understand the possibility of perhaps injuring oneself and someone else. For a Kitesurfer whenever they put a kite in the air. Of course you could have a mishap and something could go WRONG.... In this instance you are liable and responsible for such an instance.
Take a look at a car licence, people do a theory test and a practical test. No on going tests necessary. If you break enough road rules your fined! You may loose your licence, pending how many times you break the rules.
In the instance of car drivers there is a compulsory 3rd party insurance. You may also take out comprehensive insurance to protect yourself from being up for being sued $1000's
And of course having piece of mind for your ride being covered too.
For kitesurfing there is a public liability insurance called Aksa. So really if your a Kiter you should join and that way your covered if you hurt a public person on the beach.
I agree that kiters need to be safe and aware of the responsibility that lies on there shoulders...
Join Aksa and have fun kitesurfing, enjoy the freedom peeps :))) Peace
) There are people and particularly children who will walk up very close to the kite (if i keep it at like 2 - 2:30 while walking up the beach) to see it better... 
