Here in Chicagoland they'll tell you it's a sin to put ketchup on a hot dog. I always say, "It ain't your hot dog, it's mine, fuck you!" But I've never been much of a trend follower.
Try it Reggie. Fry up the bacon, set it aside...in the bacon fat, first dice a hot pepper (serrano or jalapeno), then add diced onion, sautee that, then add diced tomatoes and some garlic