When I saw this...I was pretty much speechless

Cat Nip 1.0

"CatNip

When I am using my computer, my cat often walks across the keyboard. Sometimes she renames files, selects and deletes text—once, she replied to an email. This became such a problem that I had to unplug my keyboard whenever I left my home.

But then, I developed CatNip—a program which, while running, detects “cat-like typing” and locks the keyboard, usually in under a half second. Optionally, CatNip will fade your desktop and display a warning message to your cat (which is of dubious value, since if your cat can read, your cat can probably type, too)."

"How does CatNip distinguish my cat from me?

Your cat likely types very slowly, and tends to hit many neighboring keys at once. CatNip identifies this distinctive “cat-like” typing."