WASHINGTON, D.C.—Joe Biden made a novel suggestion for cops and people who want to defend themselves against violent criminals: making them slip on a banana peel. "Look, Jack, if a criminal is running toward you, you don't have to shoot them," Biden said at last night's town hall on ABC. "All you have to do is pull out your trusty banana peel, throw it on the ground, and they'll slip. It's safe, humane, and hilarious." "Back in my day, cops didn't even have guns. They just dropped anvils on bad guys, littered rakes around them so they'd get smacked in...