Your ideas, although possible in theory, seem to come from the conspiracy domain, but anyway.

Your use-cases are far more easily archiveable the other way round: Get genetic fingerprint via blood sample and put the information in a database. So taking this effort to tag people, with much less metadata makes no sense to me.

I agree with @cata here. You also introduce a forced 200ms of latency with batch sending. I also would propose a proper protocol like RTP for network transport, which helps with handling problems during transport.