Before anyone jumps on me for not seeing it from the cyclist's perspective, I spent several years commuting by bicycle, frequently going home after dark. During that time, I made damn sure I had enough lights and reflectors for car drivers to see me. I was never under the impression that basic safety was anyone's responsibility but my own.
That of course doesn't mean that there aren't car drivers out there who are careless around cyclists, but cyclists themselves have to take the first steps, such as making sure you are visible to everyone around you, (including avoiding getting into other people's blind spots), and above all maintaing awareness and caution at all times. I realize I probably sound like a school teacher, but they say these sorts of things for a reason. A cyclist with cavalier, reckless, or lackadaisical attitude towards safety is an accident waiting to happen.