Boy, wouldn't it make your life miserable if the answer was 'no'?

You do know what CAPTCHA is, don't you?  I'm sure you've used it.

CAPTCHA, which stands for (C)ompletely (A)utomated (P)ublic (T)uring test to tell (C)omputers and (H)umans (A)part...

Here's a sample from the comment form from my blog:

Pretty straightforward, right?  You look at the picture and you type in what you see.  But is it safe?  Jeff Atwood takes a look.

Oh, come on, you don't expect me to spoil the surprise, do you?