go2vanguard.comは安全ですか？

This site is OK. The rating by Cheater87 seems to be completely random.

Don't know why the previous poster said "malware". There appears to be nothing about the site that is malicious. It is a company web site. Did the site once have an embedded script? If so, I don't see one now. All I can find is "WS.Reputation.1", on Symantec's web site (http://www.symantec.com/security_response/writeup.jsp?docid=2010-051308-1854-99). That says "Because this detection is based on a reputation score, it does not represent a specific class of threat like adware or spyware". But why was the reputation score low to begin with? Is this a self-fulfilling prophecy: someone says "low", so that gets turned into a report of "malware", which leads to further low scores? There's no way to tell.