Slf: Capn Bloggs gets my vote. If you illuminate a sign which people have to ignore to use toilets, or which shine while cc are serving dinner, no surprise the little light is ignored Replace the sign with a warning symbol which only lights when needed. Otherwise say that you should fasten belts at all times when seated. Repeat it. Enforce it. There is only so much a little light bulb can do.
In the mean time I will strive to toughen up