What is the psychology behind posting quotes and attributing them to famous people?

To the point it’s ridiculous. Just saw a post on fb: “Boston is probably the only major city that if you f*** with them they will shut down the whole city…stop everything….and find you.” They attributed it to Happy Gilmore!

That goes beyond absurd, you know? It just made me wonder whey we feel the need to link certain things to famous people?