I think they should be opened.
I mean, If I walk into the Machine Zone- and look around for notices, I would see them! Same with mycopolis, or New Dunwarren, or lower. If you dont go into that area of town- then you dont see the note. And you shouldnt post a note without going there IG anyway. Just as if something was posted at Mur, and you've not been there in 2 months. The meta-factions were basically a way to help people screen where things are posted- if you don't go there- then don't read the notes that are there! Or if you must- then realize its not IC.
If the Tyrran church needs a notice board, then by all means- have one. But the Tyrran church isn't suppose to be the only faction within New Dunwarren. So it wouldn't make sense the church to be using the New Dunwarren faction's public notes of the area for super secret stuff.
Now- On that matter. I would love to see these (meta) area's build up other factions inside them. As it stands, Creating these meta factions were suppose to be like creating smaller internal cities, but since they could never maintain a player base large enough and diverse enough, they seem to have instead become one big faction.
If they are suppose to be one big faction then keep them hidden, and remove the ones (machinezone) That have little to no non-factioned traffic. Call them what they are.
Public notes: are public around that area- anyone in the area can find them. Anyone traveling around that area can go look for them.
Factions: Are not public, they are factionized. They work as a single unit, rather then a diverse community.
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Edit:: AND! If the New Dunwarren is gated community that wants to restrict peoples ability to even be oocly aware of what they are doing- then you best block even those Neutral and Good PCs that walk in and look around. Because, if they don't grab a mod or a dm and ask for permission, then they don't have access to what they are seeing. Even though they have access to the area without question- ?.?
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For example, this is something most everyone can see:
Metafactions
No new posts Old Sanctuary
Public postings, events and sentiments of Old Sanctuary.
And if Meta faction were opened, we could avoid This:
Public Notices
[Sloppy note posted in the pissing crone]
Blah Blah blah....
I'd click the second just becuase its in the forum that is suppost to have information that is posted Either everywhere in the city, or Somewhere really remote. (which realy should have its own forum thing: Ex Mur and the Underdark)
It just helps Organize, what we do and don't see, and WHERE the information can be found IG.
Whats the use of these forums if you can't make a character and then opportate in them with Dm or Player Approval? And whats the use of the these forums if people will have their characters look at -all- of them -all- the time? I say post where its posted in the correct forum, Then be respectful enough not to meta-game some distant post.