But if "There is no question that the three signs constitute political speech protected by the First Amendment" then he would not have any threat of jail to avoid would he? Apparently there is some question that the signs don't constitute protected free speech. question enough that he was worried about being thrown in jail for being a common criminal.
And it figures you would think a childish temper tantrum was "clever" - what impresses the children is just an annoyance to adults.