A couple of years ago I was visiting my (now ex) girlfriend in London.

We went for a walk in the the park on a nice, sunny afternoon. We failed to notice that a section of the path out of the park was marked as a cycle lane. Suddenly a female cyclist, pedalling madly, swerved round us and screamed, "you're on a f**king cycle path!!". Several small, carefree kiddiewinkies were on the cycle path too - she screamed at them as well. Some cyclists take themselves far too seriously.
Many cyclists also seem to operate a weird sort of logic which goes something like, "cars are bad so cars don't exist" or "I am morally superior to car drivers so I can perform any sort of manouever, whenever I like, without any warning and it's up to the car driver to avoid hitting me." (which it is, in a way - but don't push your luck!!).

Having said all that I believe that cyclists have a right to be on the road and, if I'm driving my car, I promise to do my utmost to be aware of you and to avoid hitting you. But please bear in mind that if the worst comes to the worst and you do something rash and unexpected, right in front of me, while I'm driving at 30 mph, you're going to come off worst ... that's just the way it is, unfortunately.