When a windsurfer does that to you, there is one real solution: my brother and i do it to all the snobs on the water, we yell out when we sail pass them and go, woo hoo, woo hoo real loud, with the sound of a girls voice, it throws em of track every time and least they look at ya.. We make the sound so loud that they nearly fall off there boards, even if there is no wind and we are slogging along. We love stirring the snob kiters as well at inverloch..