Yes I am but I was in my truck off duty and unarmed. Unless I am armed and someone is gonna die I aint doing shit![/QB][/QUOTE]

I did that once while off duty, some prick passed me by the right, freak me off, pissed me off, enough that I followed him hime ( bout 30 seconds away, just like in your story ) and briefly informed him that what he had done was illegal and dangerous. He was obviously annoyed about what I was telling him, and told me to go check with police and that what he had done was proper. I then told him that I had forgotten to tell him that I was a RCMP member, and that I was the one patrolling that road. He was even more annoyed and just went home.
The following day, his girlfriend came to the office and asked for excuses, saying that I wasn't supposed to tell people how to drive etc.. The officer taking the complaint was furious ! Kicked her out of the office, and went looking for the boyfriend for weeks after, trying to nail him good.
Complaint was dismissed, and I stop carring about what people are doing while I'm off-duty.
I just get pissed cause I don't get any tailgaters when I drive police cruiser, but in my truck, they're everywhere.

As for this topic story, the BMW was driving dangerously, took risk, and had an accident because of his actions.
Deserve a ticket, and a huge increase in insurance.

Dob