.....but the ground crew shouldn't let them
through the gate in the first place. This is simply passing the buck to the Cabin Crew on the aircraft which is a much more difficult environment in which to deal with the problem.
In the past the Captain was informed if there was a problem passenger(s) at the gate, but now with everything time target driven, in my experience, it doesn't happen any more. All the pax through the gate by STD-15 - job done. The fact that 10 of them are a stag party and drunk doesn't come into the equation because that's now somebody else's problem (CC and Flightdeck)
A4