This is the Taco Responsibility Index, where we rank all the best and worst of the worst of taco toppings, cooking methods, and consumption habits.
Because who needs a good taco when you can have a great one with a big ol' slice of charred, salt-crusted beef?
Sour cream is like the participation trophy of taco toppings: it's just going through the motions, but nobody actually wants to be there.