People just don't respect their machines. They expect them to cope with as much abuse as they can throw at them, then complain when they break down or go wrong. It's like someone said on the washer site the other day......the most common excuse people use is "Oh....well it's ok.....I didn't know!"
More like they were too lazy to be bothered with learning how to use the machine properly in the first place. I'm constantly amazed with how little some people care for their belongings. Every time I think I've seen as bad as it can get, something else comes along to surprise me even more.....