I'm sure I'd read about similar objections and because of that I've stayed away from them too, but at the same time I used to hear a lot about things like "Rejuvelac" and kefir. Jordan Rubin also recommended making a fermented ginger drink, I guess it depends on it. I myself can't eat cheese now and I doubt fermented cheese would be good either, those usually have mold and/or their mycotoxins, which are not good for us. So I agree that we have to be very careful choosing the right ones.