Yeah I agree with you on that point, but what I'm saying is what if one of the reasons that its been kept secret is that it would more or less destroy the world and the Gorousei are trying to prevent that.(I realize that this is most likely not the case) After all if we consider that the finding of One piece will coincide with learning about the Void century then the war Whitebeard talked about could very well be what the WG fears(in that it will destroy the world).
The Roger pirates know about the Void century but they chose not to do anything about it(hell they could at the very least told Dragon if they thought that whatever happened back then was so reprehensible) we should ask ourselves why that was.
I don't know whether am making sense, I guess what am trying to say is information(the void century)is power, power that could destroy the world.
Did they no Robin was a child or did they just know that one escaped? Also I think that its possible to pass on information after all they all came from the same Island so the archeologist would know who to trust, hell they could even have written it down, dropped it, someone comes along picks it up becomes curious and the Domino effect begins, I think this is what Akainu figured and he decided to nip it in the bud.
As for Robin her being able to read the poneglyphs is what made her dangerous in the first place(I believe its also the reason Ohara was wiped out in the first place). Think about it this way what if Robin was truly evil and not simply a woman who wants to learn about History she could already cause alot of damage if you assume that she gave or used the weapon Arabasta had.
Oh I've just realized that the higher up marines know that there are people who can decipher locations to weapons of mass destruction and to them it is for the greater good to wipe them out instead of hoping that they don't use this knowledge to plunge the world into chaos.
That's my point. The only way knowledge could destroy the world just by being revealed to the world, and the only reason the World Government would want to suppress it so badly, is because it would reveal something unflattering about the World Government's founding. There is no way information about history being released could actually harm the common man, and so the government has no right to kill innocent people because of it. The scholars might technically be criminals, but because they're only criminals under unjust laws made by the government, they were really innocent people too.
It's true that the government does have the right to keep people from recreating the ancient weapons, but killing all the scholars is not the right way to go about that, and the elder stars' reaction clearly indicates that what scared them the most about Ohara was that the scholars had dug up information on the blank century and not that they were trying to make their own ancient weapons.
Desa, I think you really need to rethink your worldview. Do you seriously believe there is no situation in which doing something illegal can be the morally right thing to do?