In the question about stupid people running, the OP presented an interesting scenario. This has since been edited for clarity -- not because it was unclear, but because people refuse to answer it. Now the question has been protected to prevent yet more failures to answer.
This suggests a new question:
I have a question that strikes some people as unrealistic. How do I keep the stupid people from replying?
The answers proposed essentially boil down to:
The hypothetical can't happen because I say so
The hypothetical can't happen because somebody else says so
The hypothetical is stupid and so are you
What bothers me is that these answers are so highly voted. If these were questions, they'd be shut down, and hard. Instead, we have zillions of votes demonstrating precisely how not to answer a question, here or on any SE.
To clarify (since some will probably object to how I've posed the question):
Q: [Premise] Suppose human beings suddenly woke up one day and found they had eyes in the backs of their heads.
A: Evolution says that can't happen.
A: Humans don't have four eyes, that's silly.
A: You shouldn't ask questions like this because biology.
Is there anything we can do about such non-answers?