Maybe it's designed to prevent trolls, maybe it's not, but I would hope that Square is not trying to hide criticisms of the game. They need to listen to the player bases that were unhappy with this game; but there are plenty of people, like me, who have trudged along in the game while being simultaneously unhappy; others are clouded with delusions about how this game is great as is.
I'm not sure what the right path here is, but I personally don't think trolling is too bad on the forums as it is. I mostly see valid criticisms.