> What would be an example of an "appropriate" use of this technology?

Well, investigative officers concerned for the well-being of the individual and the potential for self harm or danger to others could attempt to help them with a taser or a shotgun.

Or, if you are a liberal you could have an algorithmic silo-ing of their posts? That way it would be demonstrably not a prejudiced censorship but something that could be investigated later if the right channels are followed.

It could be coupled with the software that detects whether people are homosexual or conservative based on their physiognomy.