only a matter of time till a jetskier cleans up a windsurfer or even a swimmer as they seem to like to hang close to shore so we can all admire them.....

I agree, tis only a matter of time. I'm just amazed these things aren't legislated more. Some of the models can easily top out well over 100kmh. You have to by law wear a helmet riding a motorbike or even a pushbike for that matter, so why not on a jet ski? Whilst I don't wear one now I would have no problem if we were forced to wear helmets.
I saw 3 ridiculously quick ski's on Saturday heading up alongside the runaway as I was heading down it. One of them had 3 very big guys on it. Imagine the carnage there if it had an incident. To their defense they came nowhere near me but their speed just left me amazed. I think one thing in our (windsurfers) favour is that when the conditions are at their best for us they are probably at the worst for jet skiers, hence I 'hope' the likelihood of a collision is less.