Saying only criminals would want to cover their face is the equivalent of saying only criminals worry about privacy. The old "if you aren't doing anything wrong then you have nothing to worry about" argument. I've never looted a store in my life and I don't ever plan to but I still don't want images of my face stored in a police database or used in facial recognition software. Wanting to protect my right to privacy is not and cannot become a presumption of criminal intent.
