Here is the process:
Fox sent a DMCA takedown notice to Google over search results allegedly leading to pirated copies of the film, Avatar. Google removed the search results
Google sent Foxâ€™s takedown notices to watchdog group ChillingEffects.org, which purports to be â€œmonitoring the legal climate for Internet activity.â€
Foxâ€™s next move was to send another takedown notice to Google, this time requesting it remove search results containing the original takedown notice about Avatar that was hosted on ChillingEffects, because that notice itself was full of infringing material
My opinion: Although it seems very legal, i think it's also very stupid!