Dear Idiot,

At a four way interestion, I watch you ride up between the stopped cars.  You pull in front of the first car and slowly work your way into cross traffic.  Cross traffic slows down and tries to avoid you, now that you're fully in their lane.  You wait for everyone to stop, and then make a left on red (from the direction you started).  

I swear, I'm going to put down the bike, run out and knock you over next time.  Idiot.