I think I spent my entire first year in Boston chasing down craphole drivers who passed me too closely or turned into me or otherwise endangered my life. Problem is, by the time I caught them I was too worked up and/or out of breath to articulate anything outside of curse words. Not very educational though somewhat satisfying to me nonetheless. I always wish I could have some pre-written card I could just hand to drivers that says:

"Hey, did you know that you almost killed me with your car? Believe it or not, but bikes belong in the streets too. Please don't hurt me, and I promise not to break your windshield with the 6 pound chain I carry with me at all times. Thanks! "

Oh well. At least I got fast trying to catch those jerkheads.