Having had some of these Gentlemen on board (and having offloaded a few) as well as having had the decent sort of fan too, I sympathise with anyone who has to do with them. They can be very disruptive, damaging and dangerous. If, like me you have a UK passport at these times, you reap the whirlwind.
As for winding my neck in (a thuggy comment by the way) I stand by my warning to our colleagues. It is much easier to liaise with the groundstaff, who can see the behaviour in the terminal and not load the rowdy elements in the first place.
( aside to Snoopy: do you speak Nihongo? Whenever I have tried to book on Skymark, I haven't been able to understand their website.)