Shambles, I agree with you that perhaps the bouncers may be doing some moaning, but if that is the case there seems to be an overwhelming number of bouncers present!

No one has an "equal right".   The host can decide who stays and who goes.   If the host doesn't like the way someone (anyone) is behaving, he or she can make a decision. There are no grey areas here - it is the hosts call to do something or to do nothing.   No matter what happens at the party, the reflection goes back to the host. No "ifs", "ands" or "buts" - it is the hosts party.

When you get down to it, it really doesn't matter who is doing the moaning. The dessert tray has been left out in the sun too long - somebody is going to get an upset stomach. Either remove the tray, get new cream puffs, or watch where you step.