Fair point, smudgiebottom, which is why I said in my post, that I'd like them to be placarded. I'd also like to see it mentioned during the safety brief.
Then again, where do we draw the line at what needs to be instructed and what we can put down to basic manners. I shouldn't have to tell passengers not to poke me in the belly, buttocks or crotch (believe me, it happens) but it seems I do. Going by other posts on here, I'm not the only one. Do we need signs to tell pax not to put full diapers in the seat pocket - or even the overhead lockers? Do we need signs and PAs to tell pax not to stand their children on the tray table? Where does it end?
Just so I'm not being biased. Passengers shouldn't have to tell crew to keep it down in the galleys on night flights. It's a basic courtesy and one of my buttons. Anyone who has sat in 4A on one our 777 IGWs knows what I am talking about.