How often is this endangering info available to anyone at my work or home when someone leaves their laptop open while going to the bathroom for 5 minutes?
It's irresponsible to collect and concentrate this much info on millions of people.
They also need to know your password to access it so at that point all bets are off.
I'm not sure if "forgetting" it is going to cut it - it much depends on a jurisdiction.
Amen.
Btw on android it's easy to make contacts self maintained. And to use an open source messenger so texts dont go through Google's servers. Not same level you're describing, but a huge defense against these "social graph intrusions."
Both of you will be carrying microphones, walking past people who are carrying microphones, and being video recorded from every building and from the networked doorstops of family homes.
And if you think that handful of megabytes is too much, they could extract a million other signals that tell them this, such as who you have pinned in the relevant apps.