wahoo has it -- it's not a justification, it's us telling the drivers to STFU. I was taught not only that passage of Scripture, but in the military I was taught, "you have to BE correct before you CAN correct."
I'm all for enforcement; bring it on! Blowing reds is a pet peeve of mine, too, and I haven't owned a car in 5 years, or driven one in probably 2!