Disparate Impact is a bit crazy.
EDIT: I was wrong, it was having a NO pet policy, which discriminated against families with children! (And people with support animals, and a few other cases) https://kylandlordlaw.com/blogs/news/116214853-unintentional...
Still though, I think you'd be more likely to run into the anti-steering provisions: https://www.nar.realtor/fair-housing-corner/steer-clear-of-s...