So, let's search AGS Forum with DuckDuckGo (https://duckduckgo.com/?q=ags+forum).
As you can see the first result leads to a 404 page.
I wonder how they were able to crawl is since it's 404 :s Maybe there's some sitemap with wrong links somewhere on the site?
That page hasn't existed for years, so whichever crowd DDG sourced that link from is stoopid. Either way, I've set up a redirect to the new page.
Thankee!
edit: mhhh I thought I could lock the topic but apparently I cannot