For years, patent trolls have been the best evidence that pure evil exists. And like most evil entities, they are almost impossible to stop. Even a 2014 U.S. Supreme Court decision that was highly critical of patent trolls has done little to slow their slimy, reptilian-like existence. But a federal judge on Dec. 19 crafted a novel tactic to curb patent trolls when she slapped a half-million-dollar bill on the lawyers and said that they were personally responsible for paying it, not their client. This could truly be a game-changer.