Planet13 - 4:56 pm on Sep 26, 2012 (gmt 0)
The sure-fire test ios Google's Fetch as googlebot tool - because not only the user agent but also the IP address will be correct.
I noticed that using the google cache version of a page will often show spammy links / text. In your opinion, is that a viable way of searching out hidden spam? Or is the fetch as googlebot the only way (google cache is much easier on the eyes than looking at the html code that is returned in fetch as googlebot).