If you have time to say hi then you're just not serious enough about your riding. Fun on a bike is for FORNcNewbies and they just have no business sharing the path with the 'real' riders. Anyhoo, I agree with Elsanto, keep waving, if they wave back that's great. If not, it's fun to annoy them. Crap! There I go trying to have fun on a bike again. I figure, as much as it rains here, I better get used to it.