Comments: No matter which mods I install or how I use captcha I still find that spam bots are constantly registering or looking for pages that aren't there on my SMF. How can I stop this?
From my experience the only real thorough solution is the use of a firewall, .htaccess blocking and code that follows their pattern and blocks them for it. Even if you stop them from registering they still circle around your site using up bandwidth and resources. Sometimes one bot can take up hundreds of connections and then you wonder why your SMF is slow.