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Google on its April Fool's Day prank:

Ha ha, wasn't that amusing and harmless and mostly in good taste and not all psychologically damaging under various and sundry aspects of contemporary tort law, please don't sue us.

Google on someone else's April Fool's Day prank:

You have registered, without Google's permission or authorization, the domain name googlecircles.com (the 'Domain Name'). The Domain Name incorporates the famous GOOGLE mark in its entirety. Please note that your registration and use of the Domain Name incorporating the famous GOOGLE mark in its entirety constitutes trademark infringement, dilution, and bad faith registration under the UDRP.

404 Not Found [Google Romance]
Google Circles after takedown [googlecircles.com]
Google Circles before takedown [Google cache of googlecircles.com]