I've actually learned to be more direct and proactive over the years. One of the guys I ride with -- Henry -- is very good about using a booming voice to let motorists know they're driving like morons. He also taught me the technique of riding up to an offender and knocking on his driver-side window. Scares the piss out of them.
You can read
this story for a similar adventure from last year.
Sure you want to ride with us, Spire?