Even if those who have over-indulged are not so drunk as to cause a punch-up they are profoundly disruptive. Try the EasyJet flight from LGW-HAM of a Friday –almost without fail at least one stag party aboard, heading to the Reeperbahn. Swearing, shouting, abusive behaviour to CC. In four years of weekly commutes I have only once heard a PA (in fact from the Capt) threatening to offload them all unless they got a grip. Why not add a line to ticket T’s and C’s that says the airline or its agents can refuse to board/choose to offload anyone who is disruptive. Then incentivise the handling agency ground staff not to let them on in the first place? Airline has its money already and the word would soon get around. Still leaves the occasional solo drunk who appears sober at the gate…but it’s the mobs who need stopping. Only downside would it would empower some of the more pushy gate staff/handling agents even more.