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dutch_dude - 7:51 am on Aug 29, 2005 (gmt 0)
I reported some sites for a while which I found to be pretty bad, but as long as there was the faintest resemblance to "content" they weren't kicked. An example of a site that didn't show ads a while later and I assume was kicked out was one that only had pages with a title tag to spam the search engines.
If there really is no content other than the ads they should be kicked. When you disable javascript and the ads won't show and you still see some stuff like links to "related information" I don't think Adsense sees it as a problem, as spammy and useless as the site may be.