Maybe you are not clear in the scope of my proposal, first this is a per country squad forum (that means if your in a squad in that country, it's the squad itself that's allowed into the forum and not a independent countrymate), so the admin you are pointing out would be for the squads in that country only, as for the people or squads that switch sides on a regular basis well if they want in on that countries forum they will be there for the tour that is in progress and they also must be in a squad in that particular country. 
Maybe you don't understand exactly how a BBS and it's "Forums" work.
There are "super" admins ... HT, Pyro, Skuzzy, HTC Staff.
One of those admins has to set up each and every forum on the BBS. At the same time, they also have to set up an access list.
All the forums that we see, except the "private" forums, have the access list setup up to allow "ALL" to see/post.
Now, if Skuzzy setup ... Rook Forum ... Knight Forum ... Bish Forum ... there is no way, within the BBS software, to cross link BBS IDs with what country you fly for or what squad you are in, to limit who can and cannot access those forums.
So, someone would have to allow access, to those forums, on an individual by individual basis. I can guarantee that Skuzzy will not be the one doing that. A "super" admin can give other individuals "limited" admin privs, for select forums.
I have admin privs for the "Blue Knights" forum ... every single guy in the Blue Knights had to be put on the "list" for access ... individually ... they didn't get access because they were in the Blue Knights squad.
Your idea is a good idea ... but implementation/maintenance would be a nightmare ... for someone.