Sadly, for some of these, I see their reasoning. There is a great group of law abiding cycle commuters in this city, and there is a group of people transplanted straight from the SUV to the bicycle. Then there's even another who thinks that nothing stinks, and laws don't apply to them. Unfortunately the latter two groups get noticed a lot, and do some really colossally stupid stuff. So for drivers to be a little on the upset side, yeah, I'd see it. I've seen FAR too many "wrong way" cyclists, and ones who put themselves in the middle of the left lane.
As with anything, it puts a bad image on the rest of us. Just like the ******* drivers do to the nice and considerate majority.