Yes, it's a state law that one must only represent that very state with attire or face punishment. It's Draconian but why pay for signposts if you're going to shoot yourself in the foot?
I lived in florida for a good 8 years then went all over the country in 2005 and when i went to visit it back in 2018 and was very disapointed at how crowded and expensive it got. Most of my fav places closed so there really is no other reason for me to go there again but to visit family and old friends.