"The repository's contents are likely scraped from public records" Seems like a non-story to me. If you put it out there, someone is collecting, cleaning, and selling it. The fix in this particular scenario is to put less online.
Almost every city in the US has a GIS system which you can use to look up tax record ownership of property parcels. Sales history too even. This information is also available via FOIA requests. There's probably easy ways to scrape it out considering almost every city uses the same 2-3 GIS software systems. In the case of home ownership, the only choice you have for privacy is to register an LLC under a paid attorney…
Nowadays, every time I forget one of my neighbors' last names, I can look them up on the GIS. I can also be nosey about all kinds of details like how much they paid for their house, and who is in arrears on taxes or their mortgage payments.