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.
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.