Ok, frankly I find the whole “use it or else!” thing to be kind of silly when it comes to the Oxford comma. If someone uses it, I can understand their meaning. If someone doesn’t, I can understand their meaning. If someone types, “I had eggs, cereal, pancakes and toast,” then I don’t think they ate some sort of bizarre toast/pancake hybrid. Though that would be interesting.
Anyhow, regardless of that, I had this idea the other day, and decided to just roll with it. Enjoy! Or not. It’s your choice!