Forum Moderators: Robert Charlton & goodroi
In general, if you remove the page that is being linked to (such as a spammy forum thread) and make sure that it returns a 404/410 HTTP response code, we'll ignore the links to those pages...
If you find that there's a significant number of problematic links that you can't remove which are linking to general parts of your forum (eg the forum homepage), moving the forum to a different URL might be a possibility (but I'd only recommend doing that if you're absolutely sure that these links are causing problems -- we're pretty good at ignoring spammy links).