The threat of shoe kittens has been overtaken by an even greater calamity. Many countries are reporting swarms of wild Hat Cats within their borders. These fuzzy visitors nest in people's hats and hat boxes. They then proceed to purr and shed vigorously. Removing the feline fedora filchers is a tricky business as their adorableness causes victims to take photographs rather than eject the cat from the hat. Business leaders report an increase in lateness and hatlessness among their workers.

Source : Ghora, Anne. "Scat That Hat Cat!" Journal of Cats and Economics, August 2008.