As long as traffic allows be to safely be distracted an wave, I am open to wave at anyone. I do not consider my self a bike snob of any proportion. I even return waves to scooters and mopeds. If people do not wave back, I figure it's their problem. No worries. These days I confess I am having trouble with trikes. I got rear ended by one who could not stop, I had a trailer towing trike turn left in front of me. I got forced over double yellows by a trike going the same way on a 4 lane turn who entered the turn too hot and couldn't hold his lane. Recently I had one of those Can Am Spyders come through double yellows heading straight towards me on a two lane curve. I am glad the roadside was pretty smooth as I had to loose some speed riding through the weeds. The guy didn't even stop. He had to know that he just ran a biker off the road. I am growing prejudiced, if you need three wheels, you better drive a car. Checking myself, I find that I am hesitating to wave at trikes.