Question: Are passengers allowed to board drunk? Are there rules that say someone in a tipsy state must be taken off the plane by airport security? If that were true, then whose responsibility is it that a passenger who came on sober (or at least not three sheets) gets drunk while flying. What I'm leading to is a binding limit on alcoholic drinks. Now, I can see airlines squirming at the notion of saying "no more" to a customer, but I'd rather law down that law than be scrambling jets. Of course, they may be stupid to scramble jets for any reason except a report of terrorists in control of the plane. But let's say that landings not on the flight plan also make no sense. The truth is no one who is inebriated should ever board a commercial flight. And once ON the flight, there should be no more than one drink per hour or two hours or whatever it takes for the body to metabolize the booze.