I voted Zombies fault...Basically, I'm against anything that blocks traffic. If you're going to block traffic, you need a police escort and/or those big saw horse things to close off the road. You can't just decide you don't have to obey crosswalk lights because there's a bunch of you.
Further, if someone thinks they can start banging on someone's car, and even worse try to gain entry to it and expect the occupants to remain calm and not gun it, they're nuts. Even if the car driver started it by honking. You don't try and open someone's car door. If someone tried to get into my car and my kid was in there, I'd do the exact same thing. I'm getting away from the danger, and worrying about who I ran over later.