This thread reminds me of something I saw one early morning on my way to work on I-85 just south of the Atlanta airport.
VERY light traffic on this 4 lane stretch at 4am. Anyone could pass anyone else with no effort whatsoever. Speed limit in that area is 70.
I'm in the slow lane, where I drive mostly, doing about 65~70. There are a couple of cars in the fast lane passing me...I'd say doing about 75~78 or so and they've got decent distance between them. Nothing unusual going on.
Some guy comes up the fast lane behind them doing probably nearly 100. Rather than blowing right by them on the two wide open lanes between us, he runs right up on the rear car's bumper flashing his lights like crazy, like, "I'm king of the road and you WILL move your ass OVER!"...and the rear driver
does move over immediately. 3 seconds later he's on the lead cars bumper doing the same thing...flashing his light like crazy.
Suddenly the lead car flashes HIS lights right back....and yeah, they were mounted on the package tray.....and yeah, they were BLUE!

It was
hilarious how fast the speed demon backed off of that guy...lol