> there's a very real chance for people to be misidentified and potentially implicated in crimes they didn't commit, again this has already happened using exist

> there's a very real chance for people to be misidentified and potentially implicated in crimes they didn't commit, again this has already happened using existing DNA databases. The solution there is more light, not more obscuration. You are right, the more samples you screen from the more false positives you will get. The solution is to corraborate the matches with other information, and being transparent about the levels of confidence.