I took DS to a party today at a very nice Soft Play area in our area. Beautifully furnished, nice coffee bar, organic food and out of town so it's quite exclusive. 
DS was invited by our close friend's sister's son. We have met him just a few times and DS and he seemed to click, so it was a kind and unexpected invitation.
Malcolm (let's say) had invited almost all of his class and they all seemed a very well-presented bunch, and all played very well together at the party.
Buffet time came and the staff were actively encouraging cutlery banging and prolonged chants of "WE WANT FOOD, WE WANT FOOD, WE WANT FOOD.". I was horrified at such impolite behaviour. 
DS was quite clearly out of his comfort zone, and as the brouhaha commenced, he looked uneasily a me and one small shake of my head was enough to keep his behaviour in check, and his cutlery stayed untouched as is proper, and he sat silently, politely in his chair. I was such a proud mumma.
I glanced around, fully expecting to witness chastisement echoing mine from the other parents, but, no, they were actively encouraging their DC to partake in the shenanigans.
AIBU to think that the countenance of this sort of rough behaviour was completely improper and beyond the pale?
I am also considering emailing the manager with reagrds to this thuggish behaviour - surely this sort of behaviour needs to be discouraged in a society teetering on the edge of anarchy?