One of the strategies used by the propagators of scareware (rogue) is trying to attract users’ confidence through “evidence” of people who have already acquired the “solution” Yet we know very well that only part of a scam that seeks to complement the overall strategy of propagation/infection, and that if we install this program we will end the system infected by a scareware. Therefore, don’t you wonder who are those who assert the efficacy of this fake antivirus tool?”]
Source: http://malwareint.blogspot.com/2009/12/testimonials-scareware-and-credibility.html