Phillips has made a post on his blog, wherein he mention about his blog Google.blogoscoped.cn, on which AdSense ads stopped showing. Google informed him that they’ve banned showing AdSense, because:
Publishers are not permitted to make prominent use of “Google Brand Features” on sites showing Google ads. Google Brand Features include Google logos, product screenshots, or other distinctive features. Additionally, publishers may not place Google ads on sites incorporating Google trademarks in the site URL or on sites that frame Google pages, including search results pages. Which means in your case that the word “google” in the URL is not okay for showing ads, hence we had to deactivate serving to the site.
Another site, that’s affected is of Ionut Alex. Chitu’s blog Google Operating System(an unofficial blog), but one that uses the URL googlesystem.blogspot.com – got AdSense-banned.
He further writes, Google in their general (non-AdSense related) trademark guidelines state that it’s OK with them if you use the word “Google” provided you...
... distinguish the trademark from the surrounding text in some way. Capitalize the first letter, capitalize or italicize the entire mark, place the mark in quotes, use a different type style or font for the mark than for the generic name.