Let me tell you about Travis Corcoran.
Corcoran lives in Arlington, Mass., and till July 4 of this year, the self-described “anarcho-capitalist” made his living running comic book store Heavy Ink. He first ran into trouble after the shooting of Congressman Gabby Giffords, when he posted the following:

In response, the police apparently temporarily took Corcoran’s firearms license, and some customers of Heavy Ink organized a boycott.
On July 4, in an apparent response to the heavy security measures proposed for the Esplanade, he made another violently-themed tweet:

Unlike with the Long Island case, Corcoran was not simply searching for something that someone malevolent might also search for: anybody could do that. He was fantasizing about violence, but in a way that is not specific to any named individual. So let’s have a look at the law on such threats, and then I’ll let you know what has happened to Corcoran. I’d welcome your thoughts on what should have happened.