The reason because Captcha wasn't added before is because we're using the latest version of SMF, which is 1.0.8
And 1.0.8 doesn't have Captcha, where you have to recognize a code in a picture while registering.
Captcha will be integrated in SMF 1.1 though, that's about what we were waiting for. There's no need to mod your SMF when a soon to be released version will have that feature you need. But then this bot came by and illori pointed out that there is a mod for SMF which adds Captcha, so I forwarded that to Acraig.
It wasn't added before because it's not usual to install a new forum and immediately start modding it, for most people.
When SMF 1.1 is released it will have Captcha standard, and there's already a mod for 1.1 which enhances the built-in Captcha even more
