There would be a whole lot less doing and much more don'ting.
It would probably be a happier world.
I want to steal his car stereo. Just... don't.
I want to devote my life to ruining other people's. Well... don't do that.
I want to sell popcorn that burns if you put it in the microwave 5 seconds longer than you're supposed to.
Now you're crossing the damn line.
I think personally I have to go with the perennial classic "What do you mean?"
My Favorite Types of Questions Scale, with examples:
8 - 10 - Purposeful Philosophy: "What motivates humankind?" and "Is there correlation between X and Y?" (Questions which are based on facts and truths, but very broad and may not have just one "answer" or perspective.)
5 - 7 - How Stuff Works: mechanics, physics, etc.: "How does gravity bend light?" and "How do anti-lock breaks work?" (Questions that involve facts and truths, and generally do have "one answer.")
2 - 4 - Emotional stuff: "Why do you love me?" and "How much do you love me?" (Questions that are obviously subjective and have no real answer.)
1 - Purposeless Philosophy: "What is the meaning of life?" and "Is there a god?" (Questions are entirely speculative and are not founded on facts or truths, but some people believe there is one answer or perspective.)