> ... so why would they suddenly be able to tell if it effectively blocked a site that was actually malicious? The fact that there was one false positive does

> ... so why would they suddenly be able to tell if it effectively blocked a site that was actually malicious? The fact that there was one false positive does not imply there are no true positives. Google crawls malware on sites all the time: https://security.googleblog.com/2009/10/show-me-malware.html?m=1 https://security.googleblog.com/2009/10/show-me-malware.html...