I once did a flight with rather a lot of football supporters, who had been celebrating (or drowning their sorrows!) rather a lot. At the end of the PA, I decided to see how many pax had been paying attention to the brief, so
"Ladies and gentlemen, the cabin lights will shortly be dimmed for take off. If you wish to continue reading, or if you are afraid of the dark, you will find reading lights in the panel above your head."
Obviously the majority of people weren't paying much attention, as only a few chuckles were heard.