I am all for anything that contains Covid,before the last lockdown my husband and I only ever went to places that had strict rules in place, temperature being taken, socially distant tables that kind of thing. I did see some people refused entry into a restaurant because their temperature was too high, they were annoyed but in circumstances like that I feel the restaurant was correct, but I think it would not be correct if entry is refused because the people concerned had not been vaccinated due to their age.
Hopefully by the time these passports are rolled out the majority of people will have been vaccinated so there should be no issues, fingers crossed.