You left out one: the possibility that people will be deliberately denied COVID vaccination passports for other reasons than not having a COVID vaccination. It’s like when Facebook denied the “verified” status to people who were verified, but who said politically inconvenient things.
This is going to be a risk when the passport is “private” but becomes ubiquitous, especially when encouraged by the government.
You left out one: the possibility that people will be deliberately denied COVID vaccination passports for other reasons than not having a COVID vaccination. It’s like when Facebook denied the “verified” status to people who were verified, but who said politically inconvenient things.
This is going to be a risk when the passport is “private” but becomes ubiquitous, especially when encouraged by the government.