> "it should never be destructive" it's particularly important to account for psychological or social destructiveness. Rickrolling someone can be funny. Pret

> "it should never be destructive" it's particularly important to account for psychological or social destructiveness. Rickrolling someone can be funny. Pretending that you're pregnant and then saying "April Fools" later in the day can be psychologically harmful to those who struggle with infertility or who have lost a child. Replacing someone's PC startup sound with flatulence can be hilarious. Posting a fake, mean story about someone else can prompt others to pile on thinking that you're serious, and damage a relationship. Rendering all webpages in Comic Sans is worth a chuckle. Nuking someone's e-mail conversation can cost people their jobs, or at the very least can result in important (business-critical or even life-critical) information getting lost in the shuffle. This joke could have been funny, if it had been carefully tailored to be non-dangerous and non-destructive. It wasn't.