User blog comment:Kaido King of the Beasts/Chapter 818: Stepping Stones to One Piece/@comment-4374114-20160303195953/@comment-10543621-20160304124459

Actually on second thoughts, I think most people knew that Nico Robin could read the poneglyphs simply based on the fact that she's basically well known as the 'demon of Ohara'. The thing was, she was pretty much hidden before she joined the SHs. As for why no one went after her AFTER she joined the SHs, I guess the news probably just wasn't big enough for it to have reached the bigwig's ears. Afterall, the SH's were an unknown tiny crew before the timeskip. I don't think the Yonkos generally care much about paradise crews.

I think it was probably only after the events of Enies Lobby, that logically would have even caught the attentio of the bigwigs. And basically after Enis Lobby, the crew disappeared into the Florian triangle, and after Thriller Bark, they pretty much got separated at Saboady. Not much time there for anyone to target the SHs.

Actually, talking about this just made me think of a somewhat wild theory. Until now, we haven't actually been told the motivation behind Kuma's action of separating the SH crew. What if, Kuma actually did that entirely because of Robin? We've learnt that Dragon and the Revos value Robin a lot because of her ability to read poneglyphs. What if Kuma was acting under Dragon's orders to protect Robin. Afterall, they'd be aware that even if Robin survives the Marines and enters the New World, she'd definitely be targetted by the Yonkos, and at that point, the SHs were clearly not ready for that. Thus, instead of simply sending them all to the same safe location somewhere, which Kuma could have easily done so if he really just wanted to save them from Kizaru, he separated them, forcing them to delay their entry into the New World. For Robin, he specifically sent her to an island where the revolutionaries were already planning to liberate, and were just about to do so, thereby arranging Robin's meeting with Dragon.