Anonymous8: This is english, not multiplication. 2 negatives don't cancel each other out and make it positive. Hell if it worked that way no one would be able to decipher Chaucer's work. That man took multiple negatives to a whole nother level.
Anonymous14: Well, actually, it works on a syntactic level in modern english, negating the element to which it is attached. However, this sentence is ambiguous. Don't not wear no pants. n-do n-wear n-pants is one answer, which sounds weird and basically means "don't you not wear any pants?" Or it could be n-n-do wear n-pants, in which case it's inflectional, emphasizing the negative case. "You don't NOT wear no pants, right?" One might understand it better with the more common sentence of "I didn't NOT do it. . ."
>do not not