Aggressive Taxi Passengers

This couple needs to be sued big time! Please watch the below video. Though I don't understand Korean, I can clearly see with my own eyes that what they're doing is totally uncalled for. They probably didn't know they were been filmed, or maybe they forgot?? Whatever the case, good thing cab drivers have a black box, because it makes us see what people are capable of when they think no one is watching. Now that I think about it, they probably didn't think it would be broadcast worldwide like this! Serves them right, they should really be ashamed of themselves. Utterly rude behaviour!
So according to what I could find on research, the couple in their 20s brutally assaulted the cab driver near Hongdae Station, by kicking and pulling his hair. The couple initially thought the cab is empty when they entered, but it turns out the driver was waiting for a passenger who had made an earlier reservation. Although the driver actually tried to explain the situation (check out the guy using his phone, so was he even listening..?) they still entered stubbornly. The driver politely asked them to leave, but the couple still refused even after the customers with the reservations came, and instead reported him for not taking passengers. The guy then violently grabs the driver's collar and violently threatens him, while the girlfriend tries to call him down and they leave. It seems the ordeal is over, when suddenly the guys goes to the driver's side, opens the car door and starts kicking the driver. When the driver decides to defend himself, the girlfriend too starts assaulting him.
What even made me more upset after watching the clip is the people who had seemingly made the reservation for the cab. After seeing the altercation between the couple and the driver, they just up and left!! I mean they were at least three people, and the couple were a man and a woman. Why couldn't they open their mouth and help the poor man and remain in the cab, instead of just leaving? They should also be ashamed of themselves. If you understand Korean you can read the original article on the insight news website. What are your thoughts on this?

Source: YTN News Youtube Channel