CAPTCHAs are those distorted images of letters and numbers used to prevent the automated use of websites. They are supposedely random, but sometimes they seem to be "telling you" something; others are just plain ridiculous or humanly impossible to read. Here's a collection of the strangest, most bizarre tests agains spam bots.
Did you ever had the feeling you were being insulted by a CAPTCHA?
Google's Nazi CAPTCHA
Because filling CAPTCHAS can be fun
World's hardest CAPTCHA
This CAPTCHA drops it like it's hot
Meanest CAPTCHA ever
CAPTCHA for nerds
CAPTCHA, as clear as water
World's first Braile CAPTCHA
Cruelest CAPTCHA ever