Which set of clowns over at the US PTO didn't think that this was too obvious an idea to patent:
Patent number 7,945,653 is titled Tagging digital media. If you added “with someone’s identity,” this would be one of the rare cases where the title would reasonably describe what the patent covers.
Tagging followed by an automated email is now owned by Facebook. Can we just close down the patent office now, and declare everything they've done since, oh, about 1985, invaild?