Hey, a hundred years ago, they probably would have called him a witch for saying these sorts of things - even if the Muggles then were just as wrong!

"How am I a bad influence??" Jake tried to look shocked and innocent but a grin was threatening on the edges of his lips. "I've done nothing." He brought his chin up, looking proud, but it dissolved a moment later. "Okay, but I'm fine with being a bad influence. Perfectly fine."