Why would a landlord sign up for that though? A rating system or history is one thing, but what additional value would a tenant have in a landlord who passes these "invasive background checks"?
> - A service for employees to drug-test their employers.
What's the goal there? What are the incentives? Why would employers sign up to it and why would employees especially care? The system doesn't have your real or perceived injustices because there are a few evil fat-cat employers and landlords who just need to be shown the error of their ways and/or publicly shamed about their hypocrisy and driven off. It just happens as a consequence of the incentives involved.
> - A neighborhood watch app to report suspected police activity in your community.
What would be the goal? Every neighborhood group I've seen significantly features discussions about crimes and police activity. As far as I can see the most use people get out of them is being alerted to speed traps.