As a touring, commuting, exercising and full time bike user I feel entitled to say that very often the 'holier than thou attitude of many cyclists who feel entitled to fully occupy a lane pisses me right off. Wife and I always ride single file and we keep as far to the left as possible so as not to impede traffic. We have noticed over the last year or two a huge improvement in the consideration that motorists extend to cyclists in terms of safely sharing the road and it's a great pity that some cyclists do not feel inclined to reciprocate.
Not sure about many Chris but other than that I agree. But at the end of the day they're people, and people are idiots whether they happen to be on bikes, in cars/boats and probably planes as well.
But then I wonder why lots of people riding take main roads when there is a much quieter side ride not far away, or they ride in bunches on the likes of Scenic Drive in the Waitaks or through the middle of the city.
Many moons ago when I started riding I did a bunch that rode from the city out around the airport and was amazed no one was killed, I assume they'd been riding like that long before I turned it. Never been back since.
But I also wonder why the guy in the marine industry 4WD tried to overtake me half way through a one lane roundabout that went into an even narrower one lane exit as I rode home the other day, and then parked up at the red light 100m up the road where I caught up to him 20 seconds later, was thinking. He was quite reasonable when I explained how that kind of manoeuvre makes me wonder whether I'm going to make it home to see my kids.
Unfortunately I pretty much expect one of those kind of moments most days I'm on my bike, more if it's full moon (no I'm not joking).
Like you say, a little courtesy goes a long way.