The Twitter account @KillZimmerman has been up and running for three days, despite calls for the Internet giant to remove the inflammatory Twitterer. What does that tell you? Would Twitter allow an account named something like, say, @Trayvondeservedtodie or @KillSpikeLee? Where’s the media outrage that greeted Sarah Palin’s use of a gunsight on her Facebook page? And while we’re at it, when exactly is the Justice Department going to move on the New Black Panthers’ announcement of a $10k bounty on George Zimmerman’s head?