Although obviously regardless of Mi Yodeya policy, each user needs to apply his / her own discretion, what is the policy regarding posting information, in a question or answer, that if publicized could lead to antisemitism, provide fodder for missionaries, or have other unintended consequences?
Should this information be avoided, or is it perhaps assumed that in the internet age the world has no more secrets, and thus information may as well be publicized?
One example is lack of agreement on major topics in hashkafa (Jewish outlook) such as Rambam's principles. This can have the unintended consequence of jarring, shocking, and confusing people.
You have also got the flip side, such as The Origins of the Zohar - Why is it accepted as being true? and Is one a heretic if he does not believe in Kabbalah? which deal if anything with ideas against Rambam, but still highlights the degree of dispute about basic hashkafa. This last one centers around the veracity of works viewed by some as canonical to Judaism.
Depending on people's backgrounds this information can prove problematic.
Furthermore, there seems to already be some sort of unwritten policy to this extent, as I noticed this question: Is Mossad Assasination allowed in Torah? where nobody mentioned even the possibility that there might be any legal difference between killing a Jew and a non-Jew, but rather affirmed that they are the same. This is somewhere on the border between outright lying, and lying through omission, but in my opinion, closer to the former.