You know this document that's meant to be used to track what vaccines you got throughout your life? That thing has been used as a means to prove that you've been vaccinated. Except, now it's not enough, anymore. And why is that so? Because people started faking vaccination entries in it. They legitimately belief committing a crime like that is still better than getting vaccinated. And some people who have been found out even decided to end their own life (and sometimes even those of their loved ones) instead of facing the consequences.
This pandemic sure shows the worst in humans...and I now need to get a digital document for prove. <_<