"Quiet please and 'Please be seated' signs "
I hated those signs! Especially, when I was walking around with a rambunctious 2 year old, trying to keep my child quiet so I didn't get the stink eye by the attendant at my seat. Just like the JW's, you sit down and get the stink eye for having a wiggly kid and then you take them out and get the crazy signs shoved in your face. You're damned if you do and damned if you don't.