How to stop spam in comments I've installed reCAPTCHA module but spam still bypass my security and leave nasty comments. What should I do? How to block them?
I made good experience with Mollom. But you need a free registration at their site.

Update: Unfortunately Mollom has announced the end-of-life for their service by April 2018.  

Update 2020: I really like the antibot module. It's lightweight and pretty effective.