What’s the deal with captchas?

Check out this one from Rapidshare. I need to do what, find the letter with the little cat? I’m sorry, but did we lose a war? Do you know how crushing it is to sit in your apartment trying to download the latest Samim song (it stinks, by the way), squinting at the monitor—OK, that’s a cat, no wait it’s a dog with a cat mask!

Captchas are dumb. Thank you.