Free speech in the US

"In Texas last winter, a working 18-year-old was jailed, and is still being held on $500,000 bail, because a Canadian woman reported a single, frivolous Facebook post that he had marked "LOL" (laughing out loud) and "jk" (just kidding). Ignoring those cues, local police went ahead and charged him with "terroristic threatening." Really? That is darkly humorous even in post-terrified America."