Hey Dunc,
that hook is called a gang hook, and I am bloody glad he just missed catching me. He had to have been deliberately trying to get us, or just massively ignorant

I found that document I mentioned,
http://www.riverguardians.com/Documents/SwanCanning_Boatingguide.pdf . It seems that it is ok for power boats to be in the kiting area, but makes me wonder if the windsurfers are sticking to the 8 knot restriction in their area