What is The Point?

While enjoying my double beef burrito (w/ sugar in drink) I watched not one, not two, but three women order 5 tacos with extra meat and cheese each...WITH diet cokes - What's the point in diet drinks?

The point, I really think these women thought they were doing some small thing that would be considered "good" by others...Just like an idiot who thinks 2 more miles per gallon should make them feel good about saving the planet. SAD!