There is an established halachic principle that we do not explicitly teach Torah to non-Jews. Though the exact parameters of this law is debated, the principle issur itself isn't.
According to some shittah's, you cannot teach them any nistar/sod.
For others, the line is talmud.
And still others hold that anything outside the Sheva Mitzvos Binei Noach is off limits (though there are those with broader and narrower definitions of what that is).
There are those who distinguish between passively making available Torah (such as broadcasting a radio show that anyone can tune in to) and actively teaching Torah.
Mi Yodeya is a site that anyone and everyone is allowed and encouraged to ask Judaism related questions. I've noticed that we often have inquiries from people of other faiths. Would these circumstances where we're responding to their inquiries potentially run afoul of the prohibition of teaching them Torah?