netmeg - 12:27 pm on May 20, 2011 (gmt 0)
First of all, just because something is no-indexed doesn't mean Google doesn't know it's there. That would be robots.txt.
Second of all, I routinely no-index things like contact pages, privacy policies, PPC landing pages, etc., not because they're thin, but because they don't *need* to be in Google's index. And I don't give Google anything I don't need to.