Wow, I agree on privacy although some sound a tad paranoid. This only matters the first time you see provider not repeat (I would hope). You could always send a code word while setting up appt. from p411. When you show up you give code word.
Not married or have so, but understand need for privacy and worry of exposure, but everyone talks about how they prefer providers who are safe.
Safe sex, diseases, state and location of incalls, smoking, and high/low volume, all come up about providers, why not ones who check refs, or verify in some way that their meeting who it is supposed to be.
I don't think there's going to be one way that's the only way.
as for so finding a photocopy of id with white-out info in you wallet, if so is going through your wallet you probably have a problem(I know,I don't know)