Homeland security field agents are scouring the social media site Reddit, monitoring the communications of law-abiding Americans critical of the agency.The spying is revealed in a January intelligence bulletin produced by the Border Patrol and leaked to me. The subject of the report is Reddit user “Budget-Chicken-2425,” who is not a narco-trafficker, gang member, or terrorist. Just someone concerned about federal overreach.The report centers on Budget-Chicken’s call for a protest near a Border P...