What do you think when someone says "literally" when they mean "figuratively," or if they use "exponential" for "very"?

I’m thinking of idiotic statements like “Man, I am literally burning up waiting here for the bus!” They say literally but mean exactly the opposite. Even more moronic, statements like “They renovated the Macy’s near my house and it’s exponentially better than it was before!” Do these people know that “exponentially” has a real mathematical meaning? Have we so relaxed our standards of English that it is considered acceptable to use “exponentially” as a synonym for “a whole hell of a lot”? And one more: Although “unique” means “one of a kind,” people will often use an adjective to modify the word with phrases like “very unique” and “so unique.” “That dress is lovely! It’s so unique!” Has “unique” become just a cuter replacement for “good”?