Mario Anzuoni/ReutersTaylor Swift politely asked her fans at a show in Argentina on Sunday night if they could not throw stuff on stage. The pop star took a moment during the “Evermore” segment of her “Eras Tour” show in Buenos Aires to address the phenomenon that has had a weird vogue this year—sometimes with violent consequences. “Just because communication means having gentle, healthy boundaries, it really freaks me out when stuff gets thrown on the stage,” Swift said. “Because if it’s on the