With airlines increasingly seeing the holocaust as a brilliant business model for air transportation, I've started countering it by bringing my own food and alcohol on board.
I never thought anything of it until one time when I flew "Spirit" airlines, an airline who's naming must come from the likes of George Orwell, as I've never flown on any airline so seemingly intent on crushing the soul and spirit of its customers in every way shape or form. Anyway, their inflight announcement specifically forbid consuming your own alcohol onboard.

Anyway, are there rules regarding this or just airline guidelines? What happens if you get "caught"? I could see some FAA bureaucrat with some holy righteousness claiming the flight attendant's wouldn't be able to regulate a passenger's alcohol consumption if he/she brings and drinks his/her own alcohol.