We all carry around a radio that broadcasts our location. I guess we'll end up switching off Bluetooth except to known good devices, or when we intentionally want to discover what's around us.
I don't know, I'd probably turn mine on just so that I can get notified if I am within proximity of a high infection risk stranger. I would love to have that kind of notification.
I can imagine something like that could lead to people abusing, beating up or killing the infected. It might sound far-fetched, but this was happening in Kenya quite recently.
Just for now. Uninstall when the pandemic clears.