I think that they could designate some common public areas in which you could fly and anybody who entered the are giving implicit permission to have drones flying around them.
These areas are called flying fields for radio controlled aircraft. You join the club, pay your membership, and you have permission to fly your drone at the field and you will be covered by the club's insurance.
It won't boot until you press a key to continue. Many Linux machines don't have any facility for that, either because they are a tablet with no physical keyboard or because they are a headless server with no-one around to operate them locally.
I can see there will be a market for a USB device that emulates a keyboard and sends a keypress at a predetermined delay after power on. It shouldn't cost much to make and can be easily installed in servers that are required to reboot after a power outage.
Earth is a beta site.