Ok, fair enough.
But I still don't get the point being made - which now I re-read it seems to be that complaining to grouper is making a big thing of it.
It seems perfectly logical to me; if you're in a business relationship with someone and they send you a people who go and have sex in the toilet (something you wouldn't necessarily expect to happen) why wouldn't you pass on that they had to be thrown out?
What if the group had gotten drunk and smashed a table?
I spoke to some friends who work in bars about this, out of interest, and their thoughts were that, as an individual, if they caught someone having sex in the toilet they would be quite thrown by it. One guy had actually had it happen to him about 18 months ago and he said that he still tells that story with some regularity.
I think there is quite a margin between complaining "up the chain" and calling the cops (which certainly would be too big a deal).