Dear Starlight Glimmer,
You are a noodle-brained puss spigot! You never let the good guys roam free, no matter how indoctrinated they tell you they are! That's why you make them do something crazy that only a successful brainwashing can produce, like eat a bug or kiss each other or something! You're a terrible and gullible villain, and I hope you get lost in those caves and rot!
Sincerely, Discord.
Nah. Won't work. It's too cold in those caves. The chill will probably preserve her body.
And in five thousand years some random ponies will find her half buried in a glacier, and then archaeologists will look inside her tummy and deduce she was a terrible and gullible villain. And pictures of her will be displayed in museums and ponies will forever remember her as a terrible and gullible villain.
You see? Now everypony wins!