Many roadies think that it is better to ride on the line instead of staying within the bike lane. They think that riding on the line will make them more noticeable and important to a car.
This afternoon I saw some teenage girls (I think) in a Honda Accord almost hit a roadie riding on the line. The Accord's passenger side mirror brushed the roadies elbow hard as it passed. Though it wasn't hard enough to make the roadie fall off his bike it did make him go off balance and sway 10ft out and into the middle lane! Luckily it happened during a time of light traffic, otherwise that guy would have been f'd.
Don't ride on the line! Stay inside of the bike lane and as far right and away from the cars as you can. Use a bike path whenever you can and get on the sidewalk when there isn't a bike lane. Those who think that they share equal rights on the road as a car and think, that cars need to notice them are fitting to die.
There have been times while driving that I have been absent minded or talking on a cell phone or adjusting volume controls on the stereo that when I looked up I found myself driving partially in the next lane and sometimes, the bike lane.