Wouter,

So you now understand that rules 11, 16.1 and 17.1 apply and what you said above was wrong ?

And your comments about crashing are also not valid.

If you are going to be capsized by a boat below you taking you higher than the kite will let you, then you should have taken the kite down!

Overtaking to windward (with the kite up) where you do not have a clear overtaking lane is not the place to be.

Remember, if you do have a clear over-taking lane, another boat cannot block you - without being able to justify that the alteration in course was "following their proper course". As they are not allowed to defend for greater than 2 boatlengths below you.