The situation may not have changed in twenty years, but at least the reported incidents are fairly clear: usually LoCos, not because they're dirt cheap, but because they specialize in holiday destinations (they also feature cocktails on demand instead of a dismal wrap and a half drink from the cart; usually the offenders are males; and usually outbound. The boys are heading out and the party starts once they're past security. The other group is those who have broken into their duty free spirits. I've seen a few people pour it on in the lounges, but generally, it's more efficient to do it with duty free or in the airport bars.
so yeah: common sense and knowing your destination.