3 & 4 seem significant, though perhaps an inevitable problem with any location/rescue tool that bundles into cell phones. After all, even without this a parent could easily call and say "take a picture of where you are and send it to me" or "go on Facebook and share your location". Information sharing almost always risks invasiveness if someone has the power to go "share now or face consequences".
That said, the last known location feature seems like a special concern. Right now "my phone is off" is a cure for location requests from an authority, even if it carries the possibility of later action. This change creates a system where last location is available regardless, and a clearly-intentional settings change is required to alter that.
I don't know how much of this to lay on Google, since "don't build tools authority figures can misuse" would have prevented fire. But I do think there's a common failure to consider use cases like minors with authoritative parents, when it's very possible to build tools that are at least less easily misused in that situation.
That said, the last known location feature seems like a special concern. Right now "my phone is off" is a cure for location requests from an authority, even if it carries the possibility of later action. This change creates a system where last location is available regardless, and a clearly-intentional settings change is required to alter that.
I don't know how much of this to lay on Google, since "don't build tools authority figures can misuse" would have prevented fire. But I do think there's a common failure to consider use cases like minors with authoritative parents, when it's very possible to build tools that are at least less easily misused in that situation.