we've had people being forbidden from taking trains or entering restaurants or going to the movies based on their vaccination status in western europe for very dubious sanitary reasons ( one could still be contamined with the black plague a enter those movies as long as they had covid vaccine, which was clearly not changing anything to the epidemic dynamics)... and nobody but a super small fringe minority cared

I was building an e2e app at the time, and let me tell you i had a real existential crisis as to why i cared so much about people's privacy against their own will