I think you are missing the point of the OP. Is not about keeping anonymous, is about sending your personal documents to someone. They may end up in the dark web for 10$ a piece.
Oh! I see, I am sorry OP and thanks paxmao.
Well this is unfortunate. I would not give my ID to a company which could not even establish a reputation in the market yet. If I was you then I would report the bounty thread and would create a scam accusations thread against the ICO and the bounty manager.