The scumbag also owns the Logan Theater.
The list is the municipal public record system and you enter it by setting foot in housing court. A lot of background checks will include that anywhere it is legal to do so.
So what happens when you are blacklisted? You become homeless? Aren’t there anti-discrimination housing laws?
I don’t think you become homeless but the options certainly decrease by a lot and the quality won’t be as good. Anti-discrimination laws are on the basis of, e.g., race, disability, or family status. Unless there are state laws against checking previous court cases, I don’t think there’s anything stopping that as a basis for refusing to lease a place.