I had to do parking enforcement as a regular part of my job when I worked for a university police department. This show cracks me up and brings back memories. They have not shown anything as bad as things we saw regularly. No one has been deliberately hit by a car yet, or spit on, or had drink tossed on them from a moving car. . .
My first job in the dept. was in dispatch and on weekends we had to do impound releases. I had a guy who had been towed from a handicap space try to attack me through the service window which was just an unsecured opening with a waist-high counter. He suddenly started screaming and lunged over the counter swinging at me (a lone woman in an apparently empty building).
Luckily, one of our police officers came around the corner behind him just in time to save him from a crack on the head with a fire extinguisher. He ended up with an arrest record and an expulsion from college in addition to a towed vehicle.
This was my first experience with how crazy a person can get over their vehicle. It was just a bit ridiculous since the tow was only $25 back then and we did not make them pay for the citation before taking the car! During the same time period, the city police charged $200 for a tow plus the cost of the ticket!!
I always argued that we should at least have pepper spray in there, but they never got it. Once I became a patrol officer, I would respond ASAP to calls for help from our parking people because it was amazing how stupid/violent people would get. We had an assistant football coach who tried to run over a pregnant parking officer. Just craziness.