Originally Posted by
Jim from Boston
A couple years ago on the Wall Street Journal morning news program on the radio was a feature segment about runners and cyclists greetin geach other. The most significant reason to do so, as I recall was that both participants in such an encounter face the same dangers on the roads and MUPs.

While this is true, the same could be said for drivers in cars on the highway, in inclement weather, etc. They aren't waving to every other driver. There are a lot of people on bikes, and if I have to wave to all of them, or greet them, then I won't be having fun on MY ride.