I'll bite :)
Why do the 'vaccinated' fear the 'un-vaccinated'?
6 publicly visible posts • joined 1 Jun 2018
I'm with you on this, 10 years ago my children were the only ones in school (of 1500) not allowed to use the library because I wouldn't let them be finger printed. As you say, you only have to run an unknown print through the same algorithm and then compare it to your database, As to your last point, IANAL, but I would say the hash is your personal data, after all it's used to identify you.