How to stop Google Analytics "Ghost" Spam using a well curated list of spam referrer domains and web sites. Simple and easy to use with visual instructions for creating Segments in Google Analytics using my google-exclude files. Spam in Google Analytics (GA) is becoming a serious issue. Due to a deluge of referral spam from social buttons, adult sites, and many, many other sources, people are starting to become overwhelmed by all the filters they are setting up to manage the useless data they are receiving. Referrer spam produces corrupt analytics data and on many sites a good 70% of what you may be seeing as hits to your sites are actually spam referral traffic.