I don't regret it

I was on my way home from work last night, driving in the left lane next to the carpool lane. It was getting pretty dark by this point. As I'm driving, there's a black car in the carpool lane just in front of me... slowly but surely, he drifts over the double-yellow, right into my lane (not even a signal, mind you). I decide to show my disapproval for his driving by flashing my brights (I don't think honking is appropriate these days). Well, I flashed my brights, and he didn't like that, so he flashed his brights back at me...

The only problem is, his brights were red and blue. He was a cop in an unmarked vehicle.

After that, he drifted over one more lane (again, without signaling). I didn't appreciate being intimidated by the red and blue (and maybe it was just my late-night stubbornness), so I slowly passed him, making sure it wasn't fast enough to get pulled over, and as I passed him, I stared him down. He stared me down too. In hindsight, that was probably one of the dumbest things I've done in a while.

But I had to stand up for... something. Anyways, it was dumb in hindsight, and I probably wouldn't do it again, but for some reason (maybe only the lack of consequences), I don't regret it.