Futuristic sounding but probably could happen and possibly already is.
Check it out:

Harvard Professor Margo Seltzer warned that miniature mosquito drones will one day forcibly extract your DNA on behalf of the government and insurance companies as she told elitists at the World Economic Forum in Davos that privacy was dead.

Seltzer, a professor in computer science at Harvard University, told attendees, “Privacy as we knew it in the past is no longer feasible… How we conventionally think of privacy is dead.”

Seltzer went on to predict that in the near future, mosquito-sized robots would perpetually monitor individuals as well as collecting DNA and biometric information for governments and corporations.