I heard tis mentioned in a contrivisial debate here

http://jkontherun.blogs.com/jkontherun/2006/02/when_network_bl.html

" It is certainly possible that either Blogniscient or Technorati generated some sort of error, although I have used and followed both for some time and had no reason to suspect they could misrepresent search results in this manner.
"
Is there any possible way that Googs BlogSearch results can
"fiddle" around with Souceslinkes ?? E.g AAA Blogs and while BlogSearch crawlers it inserts anothe source ZZZ, (either by accident or in any means of schmatic flaws whatever....

this will generate 'false positives" ..correct.. and nobody will know the differnce ?