Rules could probably be set up to avoid that kind of thing. I imagine that questions like "what formation should I use for this battle coming up in Troyes would probably be something that shouldn't be answered. Or, rather, the response should be something like: "We aren't supposed to give specific tactical advice, but here's some information on unit settings and formations in general..."
It needs to be made clear that the channel is a meta channel about the game, not about what moves to make IC/IG. i.e.: You can tell people what a unit formation is, what the different types are, and point them to the wiki article on unit formations. But you shouldn't tell them that for the coming battle, they need to be front/aggressive/box. That kind of inquiry should be referred to the people in their realm for help.
If this channel is abused, then reports can be filed, and action taken against the abusers.
