Kittens kills spam

As tacky as this may look during actual usage, the idea seems fool proof. Rather than bypassing spam filters by typing required [often random] strings of text, the KittenAuth method requires user to click on a certain number of kitten images. Thankfully site owners are not limited to actual images of kittens.

“You then need themed images. I went with kittens and other cute animals for the ultimate “awwww” factor. But you could use motorcycles and bicycles, family members and friends or powerpuff-girl characters and dexter’s lab characters… Anything that your user base will understand and be able to decipher.”

This might not be so bad if someone integrated a Flickrstream set to use as the verification set.