I have only once really confronted someone, and it was because I was turning left on a green light, onto a street with a gas station on the corner. (after turning left, it would be on the right). There was a few cars waiting at that side of the intersection waiting to turn. Some [censored] idiot decided they didn't want to wait for the light to turn, and instead decides to drive 50' up the wrong side of the road to turn into the gas station. (This is a fairly busy intersection too, and they could not see around the corner in either direction)
The entrance to the gas station is barely past the intersection, and visibility on that turn was pretty bad. I nearly hit them head on/passenger side of the minivan as they swerved into the gas station, saved only by my rapid slamming on the brake and swerving to the left as much as I could without hitting the other cars waiting. I immediately whipped in after them. It was a [censored] woman with her idiotic husband in the car, with two kids in the back of the van! I told them off, and I did not use polite words. I told them they should not be allowed to have children if they were going to put their lives in danger because they couldn't wait 30 seconds longer to turn into the gas station. Oh I was mad. They just sat there meekly staring at me while I told them off.