This show was definitely one of the funniest episodes of Top Gear.. If it was real, they wouldn't have never gotten away from those rednecks in Alabama
And as RC has pointed out, everyone in the film gladly signed the release to have their faces on TV.
Sure it's a production, its a freking TV show. But one hell of a production.. they did a lot of work making this episode and I think it paid off.
The thing about everyone in Florida having a gun isn't necessarily true, as most if the stereotypes they "poke fun at." In Florida your are legally allowed to conceal a weapon(thus the guy pulling out that tiny 22 from his back pocket), but because of this freedom, the Police have the right to forcefully take down anyone they pursue.