Its a shame that on the actual SafeSource site they don't seem to give much assurance:

Forbes does not make any representations or warranties as to SafeSource, and your use of SafeSource is on an "as is" basis, at your own risk.

I suppose it is just to cover them legally, but they could be a bit more reassuring to whistleblowers and informants who might not understand the technology very well or the credentials of those who have vouched for it like Schneier and others.