I don't ever want to waste time dealing with a moron simply because they will not get it when I ask them kindly to "begone from my presence". When said that way, they might think it worth their effort to try and change your mind.
Whereas, "**** off, you putrid whale vagina" will get them out of my sight immediately. Nobody, in the history of mankind, has ever stuck around to debate someone who just called them a "putrid whale vagina". It's true. I've tested the theory.