History demonstrates the problem that governments can not be trusted to protect private data once they collect it and they can not be trusted to relinquish any power to monitor citizens once they have it.

A relevant chat on virus tracking apps: https://www.youtube.com/1hKwDdBQN04

Paraphrasing:

>In the case of a pandemic, any entity collecting private user tracking data, even if they distribute that data anonymously to alert a user that they have been in close contact with an infected person, can de-anonymise that data.