I am uncertain what the benefit would be to posting into this BB
Firstly, you can use it as tool for misinformation from an official side without being recongnized, kicking out a Red Hering. Since it is per se marked as unreliable information it may not work but then again no one knows that s.o. posting information about DD fleet movements is in fact the SF Minister.
Secondly, players can use it to post information and oppinions unfiltered by their own faction. E.g. in the case of dissention inside a faction, esspecially with the faction leaders in place, one side may use this to call out to players on another faction to help them shift the internal discussion through external pressure. (Remember despite disagreements inside a faction all players of that faction may "walk the company line" when they are in an open converstation)
Lastly, you can be as creative as you can get as this is purely player created content. I mean you could use it as a joint forum to talk with your allies if you employ some encoding techniques but that would just be elaboratily silly ... or wouldn't it be?
Since facilitating annonymity is most easily achived by using Spoon as go between, he can also impliment the same rules that apply to open treason via the faction leaders in case of excessive whistleblowing