Ultimately, in any road rage situation, the bike will lose. If you insist on engaging, make damn sure you can disengage. Better yet, avoid conflict altogether--let it go.
That said, I don't always follow good advice. I followed guy to his home recently. He'd failed to stop at a four-way, nearly killing me. He was texting with one hand and drinking coffee with the other (yup, no hands on the wheel). He looked afraid when I approached him in his driveway. I wasn't trying to scare him; it's not my fault that I'm 6'3" and 230#. I calmly explained how close he'd come to killing me with his distracted driving. He apologized, and there was really nothing more to say, so I left him to his latte.