Zach Bryan is calling out anonymous internet trolls — and the social media sites that give them a platform. Over the weekend, he set his sighs on Prime Time Country Music, a country music news platform that appears to operate primarily on social media. Each week, the platform runs a segment called “PTCM Shots Fired,” where they ask their followers to share their country music hot takes. The opinions range from funny to serious and often involve making jokes at country stars’ expense — as was the case when one social media user anonymously wrote in: “Zach Bryan is what happens when you don’t di…