[why55]

Anyone without a badge can be assumed to be unvacinated.

Let's use AIDS for example, they make a badge that is certified AIDS free and then offer free AIDS testing then you can assume anyone without the badge has AIDS.

This is a hipaa violation by publishing some users information that has approval and waivers you are exposing the other users information.

Going with this example, let's say you have a group of people who voted wrong and you want to punish them, you don't let them display the AIDS free badge. It is an abuse vector.