I was thinking about a question I wanted to ask on the non-meta site when I ran across this issue. For clarity, I'll detail what my question would have been. Note that I'm just using this to show an example, I'm not asking the question quoted below.1
Question: What is the relationship between Shinobu and Araragi in the Monogatari series?
Summary (shortened): How are Shinobu and Araragi related? Why does Shinobu live in Araragi's shadow? Why was their relationship sour, as revealed in episode X of Nisemonogatari?
For reference, I will assume that the answer(s) to this question will be explained as I get further into the series. If this would have been a valid question (e.g. it isn't explained perfectly later in the story), just assume that it wouldn't have been.
Thus, the proper answer and response to a question like this might be something along the lines of:
This question is answered clearly at a later point in the story which you appear to have not gotten to yet. If you still don't understand, feel free to come back and ask the question again when you've caught up. If you weren't aware, the series is continued at
(some website)with the name
Is there a flag or standard response to use when this scenario occurs? If not, should there be? (Has this ever even been an issue?)
What do we do about questions that are asked by someone who doesn't know the answer because they haven't reached the point in the story where it is answered clearly?
1Not yet and not here on meta, at least.