In some ways its hard to blame the manufacture. I worked for a bank that had technical issues with online banking. Turns out the customers would book mark the page that shows their accounts once they logged in. This caused some issues as under testing the beta testers book marked the main site, then logged in each time.
The Ford/Firestone tire ordeal. Some how tires were underinflated and caused a roll over.
Suzuki Samari, while being reviewed the test drive twisted the steering wheel lock to lock going 55 mph with a dolly mounted to the vehicle and made it tip over.
You need a job that requires you to work with the consumer or public before you can blame others on the chain of command.