Some of you might remember the popular videos a while back of a bear user-testing a bear-proof trash can. Janea Triplett highlighted the story here.
Now a most-popular NYTimes article is related: designing the food canister that a bean can't open. It's almost anti-user design: know your user so well you make the product unusable to it. Or perhaps it's just an example of multiple stakeholders: bears and campers.