Another comment in this thread suggested that they do this because otherwise people will be afraid they skimp on safety. By treating their customers as cattle,

Another comment in this thread suggested that they do this because otherwise people will be afraid they skimp on safety. By treating their customers as cattle, they underlines that that's where the savings are and not elsewhere (eg maintenance). I guess the trick only works because it's a safety sensitive business, and the same approach wouldn't work for, say, a supermarket or a jewelry brand.