He likely has a permanent entry on the No Fly List to dog him for the rest of his life. Many jobs have a preemployment background check before an offer is committable. This terroristic threat, misdemeanor or not, will show up and probably end up shutting him out of most jobs. Unless the Florida Man has a trust fund or owns the company, his future career may consist of a carwash or lawnmower driver.
My opinions…
I think the article said he was 72. Not sure if he can redirect his SS deposits to the prison commissary, though.