walkman - 8:42 pm on Mar 12, 2011 (gmt 0)
"I thought about that, but if a single "thin" page can dilute an entire site (as has been suggested with Panda), "
Each page has a certain score, say one to 100.
Say, 40 makes it a 'bad' page
Each SITE has a certain score, say one to 100.
If a site has (say) 40% of bad pages than it is a "bad" site