I see stuff like that all the time here in the passive aggressive state of minnesota. Best policy is to let them go ahead so you're behind them and they go ahead and drive crazy where they cant effect you.
Have had one guy that passed me and two other drivers aggressively to run head on into a sod truck about a mile later, thus killing himself and unfortunately slightly injuring the trucker, who got preferential treatment from the cops and EMTs while the other guy was dying. Another passed me at about 70mph during a blizzard, thus running off the road into a ditch filled with slushy water and requiring an assist to get him out of the truck. One passed traffic in the break down lane and I could see sparks fly off his car for over 200 yards while he was driving on the highway and rubbing the concrete median. Came upon a crash scene where I had a cell phone. Motorcyclist rode aggressively and killed himself rear ending a trailer. Had to explain my reasoning to the 911 operator when She questioned why I thought no ambulance would be necessary. She was a little upset when I assured her that it was a safe conjecture because the man no longer had a head.
The bigger the pickup truck, the stupider the driver, and the bigger the crash.
Despite the relative rarity of heavy duty pickups around here, the vast majority of drive-into-the-ditch accidents or roll overs I see in my area are pickup drivers.