Usually when just draining the coolant from the radiator there will always be some left in the block. I would pressure check the the cooling system. I still bet you have a cracked cylinder or head.
No it's not like that at all. If your neighbor is polluting the air and water it also affects you even though you keep a clean yard and don't pollute. You can't clean up his pollution by no polluting yourself. It's like shoveling shit against the tide.
If it's about emissions nothing will change on this planet if China, India and some other nations don't do anything about it. The USA can cut back to zero emissions and it just won't be but a drop in the ocean of change.
I heard fire risk. Don't worry though Ford will have a work around. Maybe an onboard fire suppression system. That would do it and they can make it an option to cost you more.
Hey, at least it wasn't a recall (yet).