City Council Speaker Christine Quinn, Reverend Al Sharpton, and other community leaders gathered in East Harlem yesterday to paint over a mural (pictured) showing a rat with a noose around its neck and the slogan “Stop Snitching.” The phrase has become something of a mantra in recent years in high-crime neighborhoods, where speaking to the police is seen by some as treason that should be violently punished. Sharpton said he was wearing his running suit......