A fake anti-virus scam is on the rise, and many users on networks that you run and/or are charged with defending aren’t as suspicious as my father and sister. Don’t trust McAfee’s SiteAdvisor for a determination on whether a particular web site is clean – they rate removal-tool.com as clean, despite the fact that 11 of the 17 user-submitted reviews on the site say the page contains “Adware, spyware, or viruses””]
Source: https://blog.talosintelligence.com/2009/11/paranoia-and-rise-of-fake-antivirus.html