The rental registry would play multiple roles. It's easier to track who owns the buildings, track financialization and its mechanisms, and track the harm that some of these financial actors are causing in terms of the violation of the human right to housing, the result being evictions and issues in the habitability and accessibility of these units. It would also hold them a little more to account.
I believe the ACORN research points to having landlord licensing and a registry so that units are inspected and compliant with, again, the questions of habitability. That whole mechanism would play a bigger role in ensuring that people's right to adequate housing is fulfilled or realized in terms of the quality of housing, because there are a lot of people living in squalor right now.