Without getting into an argument about which riders do or don't nod to which other riders, it's generally fair to say that riders will nod or wave to each other. When I'm walking and I see a bike at the lights I'm never quite sure whether or not to nod or wave - on the one hand I'd like to make a friendly gesture towards a fellow rider, on the other hand I don't want to look like a tool. Sorry - I mean I don't want to look like any more of a tool then I usually do. So what does everyone else do when they're pedestrians? Do you nod/wave to other riders? And if you're riding do you nod/wave back to pedestrians?