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

[elf Pavlik]

Excerpts from elf Pavlik's message of 2011-07-19 21:44:03 +0200:
> 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

Just realized that we have captchas for registration... maybe we can experiment with any of this solutions:
http://wordpress.org/extend/plugins/si-captcha-for-wordpress/
http://wordpress.org/extend/plugins/wp-captcha-free/
http://wordpress.org/extend/plugins/super-capcha/

Possibly we may just need test them one by one and observe how it improves situation.