Common sense is a myth

Does night time drain the remaining shred of people's ability to use their brains? Why does everyone turn on their high beam at night on narrow roads riddled with potholes, making it hard for people coming the opposite way to see? When I'm blinded by these pea-brained people, I end up continuously flashing my high beam too, hoping the duds would understand, but no. They don't. They give me a glaring look like I'm in the wrong and go away. How else do I deal with them?