Rapper Ja Rule’s staring down the barrel of a four-year stretch in jail for gun charges. He reckons that the recent rash of weapons charges against his fellow entertainers is an “injustice,” ’cause “none of them meant no harm.” What’s more, it’s a conspiracy by DAs and prosecutors singling-out rappers to further their career. Memo to Mr. Rule: the right to remain silent isn’t just a right, it’s a responsibility.