If such questions are way too far afield, they'll get downvoted enough to be closed.
We really can loosen the parameters for questions quite a bit with that failsafe in place. And we should.
Let's look at costs/benefits for this case: questions that are not strictly confined to Judaism itself.
Potential benefits of excluding these questions:
--We'll have a site that is very organized and elegant insofar as it has theoretically well-defined limits for the scope of questions.
--Oh, and the site will be more appealing to "experts." (Not making fun of you @ShmuelBrin; it really is [the only?] valid point.)
Potential drawbacks of excluding these questions:
--Alienates non-educated and non-Jewish people who would like to ask about Yiddishkeit here.
That is truly a high cost, both for the site and for the world.
In my mind, there is no contest whatsoever.
Anyway, is Mi Yodeya really suffering from a surfeit of questions and posters right now?
Something tells me it isn't. Until that's the case, let's allow in all manner of reasonable questions that are asked with acceptable style and good faith.
I want to add one thing that wasn't in my original answer, but that I think is important.
The topic of this forum is "Judaism," not "Yiddishkeit."
Although in principle one is just a translation of the other, there is a subtle difference. "Yiddishkeit" was what "Judaism" meant to our Yiddish-speaking ancestors in the shtetl. It means the content of the Jewish religion and culture itself--not really their context, their place in history, or their relationship to the rest of the ideas in the world.
"Judaism" is what Judaism means in the context of a greater world--including, but not limited, to Yiddishkeit. Questions like the one mentioned would not fit into a forum titled "Yiddishkeit," but they might well fit into one called "Judaism." Just a thought.