I wonder if the information can be publicly posted according to lease contract. I see the value of avoiding bad landlords/tenants, but the privacy concern is horrific.

Imagine if pharmacies started rating bad customers, hospital publishing lists of bad patients, teachers posting lists of bad students. It would be a complete social disaster and stop a lot of people from receiving access to basic necessities because providers did not want to take a risk on some unrated or that received a bad first/second rating (which is completely subjective).