I use XenForo and it's relatively simple to stop all forum spam for the most part. I just set up a custom captcha that only people who are interested in the to

I use XenForo and it's relatively simple to stop all forum spam for the most part. I just set up a custom captcha that only people who are interested in the topic would know the answer to, and then use XenForo's built in spam catching system for the rest...though I haven't had anything get through yet once I made the changes. Also deleted forum footprint to dodge people scraping my forum off of Google, so that takes care of about 99% of all spam attempts. Someone would have to custom register accounts on my forum to get in, after which they would be destroyed by the spam catcher :)