Making comments to the crew about what goes on the other side of that door which nobody apart from the pilots is aware of, is pretty rude and will do yourself no favours. Coming on here asking if it is "inexcusable" that you didn't get a PA is going to be met with a plain and simple, no and also the sort of comment you have received. Surely you can expect nothing else?
Fair comments Cornishflyers- the discussion has opened my eyes.