During red-eyes I ALWAYS leave the sign on.......if I turn the sign on and off all night long, then the cockpit or FA's HAVE to make an announcement. How many times do you want to be woken up? Common sense seems to be a thing of the past......pax don't listen to the safety briefing in the beginning, and they sure don't respect the seatbelt sign during flight either. It's too bad that someone has to get hurt for people to get the message. Maybe this will open a few eyes.