You should let your parents sleep.
Dave's parents are asleep upstairs and Dave is in the living room and just read a funny joke online.
Dave wants to share the funny joke with someone.
Dave logs onto a web forum and posts the joke for other users to read and comment on.
Dave runs upstairs and bursts into his parents room, waking them up to tell them the joke.
Both Dave's parents continue to soundly sleep through the night and wake up rested.
Both Dave's parents are infuriated he has woken them up for something so trivial.