A dumb one. The word "literally" is already used to specify that the phrase following it is not a figure of speech. There are plenty of ambiguities in natural languages, and layering them will only make things unnecessarily complicated.

It was a valid use of the word. Language evolves.

"in effect; in substance; very nearly; virtually: I literally died when she walked out on stage in that costume."

https://www.dictionary.com/browse/literally