Road Running Etiquette

I've been running on the shoulder of a fairly busy road a lot lately and I have a system down for acknowledging the many passers-by in their vehicles:

• For those that make an effort to fully swing into or near the opposite lane - Anything from a wave and a point (if I'm feeling masculine), to just a wave, or the sign-language gesture for "thank you", or a salute (if I'm feeling goofy and euphoric)
• Any effort at all to give me space - Wave
• No effort to give me space - Stern look
• Coming anywhere near my white line - Dramatic jumping into the grassy shoulder
• Actually swerving to hit me - See above, plus Wish for Bad Karma