I'm relatively certain that the flashmob law will be invalidated at the first legal challenge through the supremacy clause of the constitution: "This Constitution, and the Laws of the United States which shall be made in pursuance thereof; and all treaties made, or which shall be made, under the authority of the United States, shall be the supreme law of the land; and the judges in every state shall be bound thereby, anything in the constitution or laws of any state to the contrary notwithstanding."
I think that the fuckwits in the TN state legislature must have all flunked out of law school...