Nothing wrong with hot dogs and Mac n cheese, but why put the Mac n cheese on a hot dog with a bun and not cut up hot dog into a bowl of Mac? This is exactly what I think of when I think about "stupid food." The food itself isn't exactly bad; it's just done in a stupid way.
Hell yeah, grill that bad boy first, to pair with the smoked mac, then slice it up and top some mac with it. The restaurant could also decrease the food cost this way by decreasing the amount of hot dog and increasing the amount of pasta. The customer will still be happy, and you're probably saving 15-25% in food cost.
I have no problem with the concept. I just don't like the execution. Grill up those weiners and get some color on them. Use a homemade baked mac and cheese or fried mac and cheese balls. Put it on a brioche or potato long roll. Toast the long roll. Add a splash of color with chopped parsley or something.
What if you spiralized a hot dog, made fried mac and cheese balls and put them on top with some cheese sauce, and then eat it like spaghetti and meatballs?