Well, let them win there silently if they don't want to reveal themselves publicly. Still, I'm curious about the first rank users.
I agree with you that all participants have the right to privacy and we must respect that right. But since this contest was designed for bitcointalk forum members, the casino must provide a way (I don’t know how, but I’m sure we can be figure something out) to verify that all participants are indeed members of the forum and that their accounts were created before the launch of this contest.
This would prevent any possibility of manipulation and prevent
the rise of any doubts about the fairness of the contest.