Two months ago, parent Lela Casey told the Central Bucks school board, in the third-largest school district in Pennsylvania, that things had gotten out of hand. In March, a man signed up to speak using an alias that referenced the comic book vigilante The Punisher, accused the school library of possessing “child pornography,” and suggested that the Democratic school board members on the Republican-majority board belonged in prison. Casey also saw him carrying a concealed weapon—something the man