Maybe building more houses would also be an option?

What other things should citizens be able to know about their neighbors? Which ones have guns? Which ones have STDs?

It's pretty rich that you created a throwaway to pick a bone with this issue.

In that case, shouldn’t there be a public registry of people who invest in weapons manufacturers, oil companies, and other corporations that produce unhealthy products?

> However in an overall social sense, I do think that residential property investment in itself is wrong because I view housing as a utility and a basic necessity along the lines of water, healthcare, fire/police services and internet.

In China, the government owns all the land and citizens merely lease it for 70 years.

Yet even with no land ownership, there is still land speculation.