I think I agree while I had a lot of problems with Cex.io last week but at the final they released the funds,of course I am never ever using them after lots of questions from their side,nevertheless I think to put that exchange here as a couple of friends have been asked even to sign a message to demonstrate their belongings in order to verify the deposits,so far more than a week passed and no answer from them,most probably it should be added to the list here.I don't know what they are thinking but they tell you after,for example they don't send you an email that your account is under investigation but once you deposit funds and then try to withdraw they bomb people with questions.Looks like this "tainted" thing is being abused in a very big way from many centralized exchanges.