Zach George and his fellow pirates used to talk tough to CEOs. Their battle cry: “Surrender the Booty!” That was more than a decade ago, when George, then in his 20s, was helping Pirate Capital LLC keelhaul companies that didn’t make investors enough money. Flaunting its motto, Pirate Capital swashbuckled its way to a fortune -- that is, until it foundered. Today George, 39, is still agitating for corporate change, now at his own hedge fund, FrontFour Capital Group. But the pirate of old seems less combative with age, at least when it comes to his father. FrontFour has held...