I have a feeling that I lot of people don't appreciate the degree of information about them that is public as a matter of policy and law. It's cheaper and easier to obtain today than a few decades ago but much of it has long been public.

Of course, availability through an API can greatly expand how the information is used but, for the most part, it's tricky to say that data is public but you have to make it painful to access.

Price discrimination based on home dimensions is illegal in Europe, so most people here are fine with some of their info landing on a publicly accessible cadastre database.