One big reason why things like this happen is due to the rapidly increasing "herd mentality" of people. Humans were never meant to use the "overabundance of prey" flocking strategy some migratory birds use to confound raptors. But you see it gaining every day. Like these people were going to "fool" the fire with an overabundance of prey?? Or that 300 people can fit through one door in 20 seconds. There were three, THREE, fire exits no one used. Why? Because EVERYONE was going THAT way to THE door! You see this everywhere now. Ask someone what they think of something and if they're against it, it's often because some friends told them or they heard on TV that's what they should believe. That's how morons like Gray Davis get re-elected. "Um, well, um, all my friends said they were voting for him because, um, well, the TV says all Republicans are racists and stuff, you know?"
Some people have absolutely no discipline or ability to think for themselves. They go with what the "crowd" does and says. That's why so many people attend these "peace" rallies. Ask most of them to articulate why war against Iraq is wrong and see how many can form a single sentence without "um" or "you know" or citing a celebrity. They're there because the "herd" they run with says they should be. And many are there out of their herd's collective fear of possible reprisals from terrorists for us attacking Iraq: "We better flock at once so as to confound the U.S. government from attacking Iraq!" And, so, this behavior is so deeply ingrained that when faced with a life-or-death situation, they follow the herd. Like lemmings off of a cliff...