I have to drive a cage for my job, but being a biker obviously I am well aware of bikers. I always make a point of getting out of their way in queing traffic so they can filter easier. Its always nice to get a wave from a passing biker when you do that for them. I suspect the bright yellow "Think Bike" stickers I have on the back and sides of the car windows probably make them realise I am a biker as well though. I also once had a nod from a biker when I was on foot. Walking to my local pub with a few mates and a biker passed slowly due to traffic. I was watching his bike and he saw me looking. I nodded, and was pleased when he nodded back. My non biking friends asked who he was. They seemed a bit confused when I said I had no idea, but he is on a bike!! I guess people don't have to be on two wheels to be nodded at either, or perhaps bikers are just nicer where I live?