I was riding back to Pai from Chiang Mai this afternoon and despite the condition of the road, it was a good ride. I passed three blokes on Versys, all returned a wave or a nod, as did the bloke on the big sports bike, and the couple on 250 chook chasers. There was a party of about 8 on Harleys (maybe a Goldwing in there also) heading from Pai to Chiang Mai, and not one of them acknowledged the universal greeting as riders pass each other. Very bad form guys! If you're too frightened to take a hand off the bars to wave, that's okay. It's good to recognise kindred spirits. You can nod, or even flash the light. That way you advance the cause and reputation of motorcyclists everywhere, you also risk being thought of, as being good blokes rather than a bunch of arrogant knobs.