The campaign claims the law going into effect this weekend could put thousands of Florida tourists in danger.
The Brady Campaign is running a series of ads and will begin handing out flyers at Florida airports, warning tourists not to get into arguments with locals during their stay.
Beginning Saturday, Floridians will be authorized to use deadly force if they feel their lives are in danger. The Brady Campaign says the law puts tourists who are unfamiliar with the roads or even the English language in a dangerous position.
It's running the warnings in airports and travel magazines across the globe.