200% agree,︀ but again, data is centralized and very few have access to the DB, jab is︁ in specific location with hundred of people and the nurse/doctor is assigned depending on the︂ queue (at least in Spain and Italy), I see no possibility to cheat the system,︃ at least not in an economical way (I mean, you can hire Russian hackers but︄ it will cost you a lot of bitcoins… 😀).