It's already obvious that we're going to get tons of Stack Exchange related questions and answers. Banning these will be ridiculous, since this is the moderation experience of most people here. And even though we plan to expand to other moderators, I don't think we'll lose the SE mods core, I even think that we are likely to remain in majority.
So, we can't get rid of Stack Exchange community specific questions and answers. From here, we have three paths: discourage all other targeted ones, or enable all others, or segregate networks in "allowed" and "forbidden" ones.
The first and third option will trigger an "unfair elitist douches" reaction in many people coming from outside Stack Exchange, and quite possibly from many from the inside too. So, if we really want to make a general site on moderating and not just an internal Stack Exchange moderating one, we don't have much choice but to allow targeted questions about other networks too.