Innovative Advertising on Airplane Boarding Passes and CAPTCHAs
Whether you are posting comments on a blog or registering for some web service, they'll probably ask to solve some kind of CAPTCHA to ensure that you are a "human being" and not a spambot.
As users are very likely to read and type the CAPTCHA text, some people are suggesting
to commercial this cryptic graphic. See good examples from Jean Yves
. Kiruba Shankar
spots this funny Yahoo! India ad on his boarding pass. Waiting for flights at the airport is so boring.