Well, there are already invite-only Skype chat rooms for Ethereum research. I was thinking of this board as being the more deliberative version of those chat rooms.
I naturally understand that transparency is a good thing. However, I know I personally will be much more guarded in what I say if I know the ethereum-hungry media will be picking over our research posts. For example, I want to avoid articles like this:
to start being based off on our posts here. (For me, trolls are not a concern.) For transparency, I think it’s sufficient for all of our work to be frequently updated on github along with the occasional press release. And when it comes to blow by blow conversation, I believe the value of being able to speak freely exceeds the social value to spectators.
Under my passworded version, obviously the board will be open to pretty much anyone who is active in ethereum research—there’s no desire for exclusion, merely not having to worry our off the cuff comments will end up on coindesk.