It's called OPSEC anon, Operations Security. Smallest possible groups to discuss the strategy and tactics to employ before disseminating information on a need-to-know basis.
The one with the hashtag of second civil war letters made me shoot beer out of my nose, funny as hell.
I have a few former Infantry friends I'd like you to say that to in person.
No offense intended anon. You had posted about brainstorming here and not receiving any replies so I offered one. I would point out that trying to develop strategy here would be akin to planning an attack while gathered around the table inside enemy headquarters. The opposition would know immediately what the intentions, methods, and resources to be brought forth as soon as they were posted.