Power struggles and Defiance 101

I came across this video of a principal clearly losing her ability to be an effective leader and I cringed as I saw how she handled the situation. She chose to use intimidation and yelling to try to get the skateboarder off the school property. To me it was one of the worse power struggles I have seen in years. To see how she totally lost her ability to reason and persuade the skateboarder to leave the property was horrifying. His reaction was to yell right back, her reaction seemed to make the skateboarder even more defiant and rebellious. I have always worked at the high school level and this situation can potentially happen with our students if we would take the same approach. I would of tried to calmly talk with the skateboarder, befriend him, give him some kind of statement like "that's a really cool trick, we have a lot of students that love to skateboard..." Then go on to let him know that it is unsafe at our school and if he could move on to another place to do his tricks. If his response was still defiance, I would walk away and call security or school police to ask for assistance. There was no immediate danger since no students were present and he was not harming anyone at that moment. In fact, her actions seemed to make the situation worse and bring out some extreme defiance in the skateboarder. This happen quite a few years ago and the Principal ended up initially being supported by the district with her actions...strange to me...but that following year she was removed (along with several other Principals) due to the school "moving in a different direction". I am wondering how much of an impact this incident had on the decision? Also, many parents complained to the media that she "used bullying and creates an intimidating atmosphere". If she handles stressful situations like she handled the defiant skateboarder, than I could see how this is part of her personality and leadership style. I know we practice and write about these scenarios throughout our program but when actually put in this position and have to handle it, are we really prepared to use our skills and strategies to make good decisions?