[okfn-help] Spam - captcha to the rescue?

[elf Pavlik]

Hi,

I keep hearing about someone working on deleting 'spam users'. How about starting using captchas? We can start with on on registration first to prevent bots from registering, if we still get spam we can put captcha on few first comments for a user account etc.

Anyone have more experience with some captcha strategies?
This link may come useful:
http://wordpressapi.com/2010/03/27/captcha-code-wordpress-registration/

=)
elf Pavlik