I agree. This (or a similar tool) is set to become a genuinely useful part of my web development toolkit.
If it used random CC images from flickr, rather than kittens, I wonder if there would be so much objection.
If you let the /b/tards' love of kittens forever bond the "kitten" symbol in your brain indelibly to the "idiocy" symbol, you are letting the /b/tards win. They are just mammals. (Kittens, not /b/tards.)
However, it probably doesn't warrant the #1 spot.