SalsaBoston.com Message Board 
Posted by Olaf Bleck on July 09, 2006 at 15:28:25:
Hi all,
In order to prevent from spammers from automatically posting garbage to this site, I've had to implement what's called a "captcha" system, which is a little piece of software that shows you an image with some fuzzy numbers and letters that have to be correctly copied over by the submitter in order for the system to accept the post.
Sorry for the inconvenience...
Cheers!
-Olaf