It's more amazing how far people will go to turn a minor incident into a mass murder. You ride the monorail and people have gotten killed on that one. Technology is great, but it isn't perfect. It has no logic or ability to reason, it can only react technologically. Because of that things happen. Machines break, sensors fail and since there is no human there to attempt to compensate for it, it bumps into another one. Unless you want to tell me that using the word "Crash" isn't just a tad hyperbolic. BTW, in case it is confusing that is defending technology in a reasonable sense, not Disney. If your Mercedes Benz breaks down is it because the owner has gone the cheap route?