21 Day Rule
After a movie has been released for 3 weeks (21 days) everyone who has seen said movie has liberty to discuss said movie without fear of being bashed for spoilers.
Guy 1: Bruh! You spoiled the movie! I ain't seen it yet
Guy 2: 21 Day Rule bro, you had time to see it
Guy 2: 21 Day Rule bro, you had time to see it