User blog comment:Kaido King of the Beasts/Why Does Doflamingo Carry a Gun? - And Other Stupid Questions/@comment-4374114-20141124214422/@comment-4164499-20141202185355

So you're saying that a devil fruit(or any abillity for that matter) have the abillity to remove/alter the majority of the op unverse population's memories? Yeah.. That's op if anything, and it would undermine the very power structure of devil fruits in One Piece. Although there is df's reaching the '"realm" of op'ness like, Kizaru's, Sugar's, seemingly Blackbeards etc. It's far from the scale of this mass memory devil fruit(op op no mi) Honestly this is such a farfetched ludicrous idea, imo

videogamp is right' its obvious that the goverment prohibited researh concearnong the void century, hence Robin/Ohara. There is more than enough hints to safetly assume that this is the case.