Well the two rogue officers in question were newly appointed (although one of them was a long time member). Both of them deposited rarely into the GuildBank.
They were supposed to be new PvP division heads of the guild, since most of the guild was PvE oriented but some of the people wanted PvP guild events too. Later i found out that they had a fight with another of the guild officer (who btw, was one of the central figures in making the guild what it is now, or at least what it was). They got angry at him, but couldnt do anything about it since... well not many it the guild liked them since they didnt help out a lot and were a bit elitist (as in blaming others for loss/wipes) etc. so they went into rage mode and viola all members of the guild were ninja kicked.
I have realized that it was in most part, our fault for not checking their background thoroughly before promoting the two. We have learnt a valuable lesson from this experience.
Although not all is lost, we have been able to track down around half of the members and invite them back. And Bioware has responded to our tickets and said that they are looking into it.
As they say, "What doesnt kill you, makes you stronger." .The guild in whole has become more united than ever after the crisis.