The Golden Rule often gets read as "Do unto others as you would have done unto you."
The Acapulco Rule could be read as "Call others only what you yourself would be called," but a much better way to say it is: You're probably going to get called whatever you call other people, so be ready for it.
Both can be attributed to Jesus, especially if you're arguing with somebody who loves things that are. If they ask you where, show 'em this. It's kind of a misquote, but good luck letting that bother anybody.
Violating the Acapulco Rule is generally considered one of the best ways to get a whole lot of people to think you're a Bad Discordian.