Since there are no official restrictions put on "Conspiracy theorists" or a strict margin on when a question becomes "Stupid", we could safely assume that questions are judged and authorized currently in an affable way.
Besides that, the question word why is not the only type that might lead to a purposeless question:
- How're people ok with this?
- Don't you guys think this is stupid?
- What were they thinking?
- When will NASA start listening to me?
OK, you get the point.
In my opinion, Just doing all those things we could with those tools provided to us, in the absence of which moderators could be notified, would ensure a genuine silly-question could be taken care of.