1. The gentleman in question as already proven himself to be an ass by the way he drove. Sadly, my experience with this kind of person is that you just wasted valuable oxygen talking to him. I give you credit for trying, but trying to change the opinion of anyone about anything they have strong feelings over is a waste of time. Usually, it takes something akin to a religious conversion to do so. (just try and convince a helmet wearer to not use one, or a nonhelmet wearer to use one and you will get my point )

2. One of the amazing features of a liberal democracy that this gentleman seems to have missed somewhere in grammar school is the notion that there is room for people who are different and who do different things to co-exsist. I find his whole rationale to be laughable and an utter farce. One, he has proven in no way that he suffered. If he is talking about slowing, then all he had to do is what you suggested and be proactive and shift lane position early and then there would be no big deal. If he is talking about sharing the road with another road user who is slower, I wonder what he does when he encounters a truck, farm machine, slower car, a cop doing the speed limit... does he moan about how he is suffering I wonder? And lastly, everytime someone plays the "tax payer" card, I laugh my ass off. You see, tax payer rights are a wonderful thing, but guess what.... every CITIZEN of a liberal democracy has rights, not just the ones that make enough money to qualify as "taxpayers". Neo-cons make me puke. (uhoh! here come the flames! hehe) And guess what? odds are that biker is a taxpayer who does not like to share the road with loud, polluting, heavy vehicles that can and do kill thousands a year in crashes and tens of thousands a year due to pollution, and destroy the pavement etc etc etc.