When defending the liberty of unsavory characters, I usually write of my native England. Not this week, alas. In the state of Texas, a 19-year-old man named Justin Carter sits in prison, ruthlessly stripped of his freedom for making an offensive joke. After a Facebook friend with whom he played video games described him as “crazy” and “messed up in the head,” Carter replied — sarcastically, one imagines — “Oh yeah, I’m real messed up in the head, I’m going to go shoot up a school full of kids and eat their still, beating hearts.” He added “lol” and “jk” for good measure. For this he was arrested, charged with making a “terroristic threat,” and thrown into prison. He may languish there until the start of the next decade.

Carter’s joke was witless and flippant — typical, in other words, of late-teenaged men. By no means was it criminal. Nevertheless, a woman in Canada, who inexactly described herself as a “concerned citizen,” saw from afar what Carter had written and shopped him to Texas police. Police acquiesced to her request, searching the family’s house in the process — and finding nothing. “They really want my son to go away to jail for a sarcastic comment that he made,” Jack Carter, the boy’s father, said. Apparently so: He’s been incarcerated since March without trial…

In the petition advocating for his release, Carter’s defenders add to their case against the state by noting that “the only items seized from his home was his personal computer. No weapons of any kind were seized.” This revelation might well provide fussbudget Canadian proto-despots with their evening calm. But it is irrelevant. As a condition of their liberty, free men may own weapons while joking in good or bad taste about killing children just as they may own weapons while calling in the abstract for the toppling of the government. Sandy Hook being still fresh in the memory, one does not have to wonder for too long why Justin was singled out from the hundreds of thousands — perhaps millions — of Internet postings that threaten violence. This does not come close to excusing the Texas police. If we started rounding Americans up for making egregious comments about contemporary events, the prison system would collapse in short order.