I unblocked Facebook right now from my hosts file so I could message someone and couldn't figure out why Facebook failed to load. I tested HN and viola I see that the entire world has sent Facebook requests to 0.0.0.0 lol
I didn't receive expected WhatsApp messages and am only now realizing there's no indication within the app that there is even a problem. It only becomes (somewhat) apparent when sending a message never gets a single check mark. Not a graceful failure for the user view.