I think we just need clarification on this subject in general. If everyone knows what the deal is, then there wouldn't be so much ambiguity.
As far as Criminal Girls go, I have no interest in the game at all, and I personally feel it crosses some lines I am not very comfortable with, but I think we need to know where GAF's line is.
There are other games (with adult characters) that I would like to be able to discuss on GAF, but have been hesitant because I don't want to rock the boat. We talk about them mainly in the VN thread, and those I speak with I know are capable of doing so in a mature manner, but there's always the risk of someone not knowing what is, and is not, suitable for the forum. But should the games in discussion be held responsible, or the posters that can't discern what is acceptable behavior?