The correct way to punctuate a sentence that states: "Of course it is none of my business, but -- " is to place a period after the word "but." Don't use excessive force in supplying such a moron with a period. Cutting his throat is only a momentary pleasure and is bound to get you talked about.
Robert A. HeinleinEverything in excess! To enjoy the flavor of life, take big bites. Moderation is for monks.
Robert A. Heinlein