Just Sanitize It First
I suppose that this is a decent idea if you sanitize the uh, equipment properly beforehand. There is no way you want to use this thing without giving it a much needed clean. Here you’ve got a toilet repurposed as a combination beer cooler and grill.
They say that necessity is the mother of ingenuity, but are coolers and grills really that expensive? I think you could probably buy a cheap one for next to nothing or you can even borrow one from a friend. No toilet is really necessary.