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Is Robert Downey Jr. the anonymous blog commenter who’s been rocking the Internet chattering class with scandalous allegations about beloved Hollywood celebrities? Speculation came to a head last week about a frequent guest to the comments section of the gossip website Crazy Days and Nights identifying himself as “Himmmm” who dropped vividly detailed, insider-y blind items about a secret call-girl ring alleged to include Hayden Panettiere and Amanda Bynes. Citing a number of telltale clues, the website Jezebel was first to ponder Downey’s involvement, and from there it became a parlor game among celeb-loving Web users to prove it. Asked point-blank whether the anonymous commenter is in fact Downey, the star’s publicist, Alan Nierob, told The Daily Beast, “Of course it’s not.”