GenCon, the world’s biggest convention for tabletop gaming and a massive moneymaking machine for the State of Indiana, has responded to a bill that legalizes discrimination against LGBT customers by threatening to leave the state—and take their $50 million-a-year convention elsewhere. This isn’t because GenCon is run by political progressives or “social justice warriors” trying to make a difference. It really, really isn’t. If GenCon leaves Indianapolis it’ll be for the same reason it came to Indianapolis and abandoned its original home of Wisconsin, the home state of founder of D&D Gary Gygax (peace be upon him). Because it makes...