Your behavior and riding style not only endangered yourself but creates an even more hostile environment for all of us other cyclists.
You were riding in the middle of the right lane of PCH 1 while just to the right of you was a totally clear and very wide bike lane. This was during the very busy morning commute. I changed lanes and passed you after having to slow from the posted 55 mph speed limit down to ~25 mph. You were hard to see due to the fact that our easterly direction was facing directly into the low morning sun.
I honked my horn at you (after being well past you) to give a little hint. You responded with your middle finger.
A couple miles ahead at a stop light I attempted to explain to you that I too am a cyclist and that your behavior was dangerous. You told me to "fuck off" and gave me the finger again.
Many motorists believe that cyclists ("Lancers") are arrogant, entitled assholes with no regard to traffic laws or safety. You fit this stereotype perfectly.
Your actions have made it more dangerous on the roads for cyclists everywhere. I hope you see the error of your ways an use better judgement in the future.