Ignorance of the law is no excuse. That is what the powers that be in this country keep telling us, anyway. The law in Florida the prohibits carrying a concealed weapon say that:
as provided in subsection (4), a person who carries a concealed weapon
or electric weapon or device on or about his or her person commits a
misdemeanor of the first degree, punishable as provided in s. 775.082 or s. 775.083.
Then it goes on to say, in 790.25:
(3) LAWFUL USES.—The provisions of ss. 790.053 and 790.06
do not apply in the following instances, and, despite such sections, it
is lawful for the following persons to own, possess, and lawfully use
firearms and other weapons, ammunition, and supplies for lawful
(n) A person possessing arms at his or her home or place of business;
A trial judge got it wrong, and was overturned. There is something wrong with a justice system where citizens are required to know the law, and those charged with enforcing it are not.