Welcome to the American wireless industry, Marcelo Claure — hope you don’t mind being ridiculed nonstop by one of your top rivals. Hours after Claure was officially announced as Sprint’s new CEO, T-Mobile CEO John Legere decided to greet him using the same tactics that he’s used to become close friends with Verizon CEO Lowell McAdam and ATT CEO Randall Stephenson. In other words, Legere decided to ruthlessly troll him on Twitter. “Looks like Sprint has a new framily member… and he’s got a lot of framily therapy to do, ASAP,” wrote Legere, who has repeatedly ridiculed Sprint’s admittedly awful “Framily” plan campaign. “You could wait to find out what the framily is going to do, or you could go with what works —