Having watched firsthand the amazing stupidity and disrespect shown by some at these orientations, I'm not surprised. At one of the courses in Gyeongju in 2009, some people thought, during an already noisy party on the 1st night (held on the 2nd floor of a hotel, audible from the 7th, by private guests who, with their very young children, were trying to sleep) that it would be amusing to set off the fire extinguishers inside the hotel room. Seconds later, an entire room was covered in several inches of white foam. The co-ordinators became aware of the situation very quickly, cleared the room of revelers, and rounded up the culprits. The culprits were sent home first thing in the morning, with a letter from the co-ordinators, to explain themselves to their principals. As far as I know, they were fired immediately, but that's just hearsay. Whatever the case, embarrassing at the least, and quite likely career-damaging. The hotel staff had to spend 2-3 hours cleaning the foam from the room.
Soooooo... This is the kind of crap that these people have had to deal with. Maybe you, OP, or others who sympathize, do not resort to this level of behaviour, and resent being tarred with the same brush. Fair enough. But it's also fair, from their perspective, that they shouldn't have to spend their time babysitting the kinds of people who do act as such. And it's also fair that responsible teachers shouldn't be having their reputations questioned because of a few dunderheads.