****s on both sides of the argument.
A safe and considerate cyclist is not a problem, in much the same way as a safe and considerate driver.
I'm a cyclist and a driver and like to think I'm reasonably safe at both (don't run red lights, I indicate and give both other cars/etc. a wide berth when overtaking, etc.) and both cyclists and drivers hack me off when they're being inconsiderate or stupid.
I use two routes in to work: a canal towpath and a main road trunk route into Birmingham. The cyclists of n the former are almost all students/etc. who don't know how to set their bikes up, can't hold a straight line and don't pay any attention to... anything. Those on the latter are normally the professional commuters in spandex, who appear to know what they're doing and pay a lot of attention to other users on the road.
I personally have never had a problem with either in either capacity. I have had somebody in a white van try to scare me off my bike whilst riding: he drove up beside me and screamed at me before accelerating off... I don't draw the conclusion that all drivers are idiots based on this event, but I did have to try very hard not to shout back at him as I filtered past him in traffic.
At the person who talked about how much of a pain cyclists are when driving a bus? Now you know how pretty much every other driver on the road feels.
In London, anything goes - cyclists and drivers fly in from left, right and centre to the point where I've almost given up driving into the capital.