If everybody adopted this then pretty soon there would be no more roads, no more people to discard anything and so on. So even though I think this is quite the statement against consumerism I don't think it survives the 'does it scale' test.
It's similar to how people in the UK live in 'eco-villages' that live of the discards of the rest of the society around them.
Stallmans ideas are very much worth all our attention and his service has brought us as an industry enormous benefits.
How would pragmatically work, I don't know (probably terribly), but a maxim in which everyone suddenly stopped owning things beyond personal possessions at the same time took up an overriding ethical system which privileged ecology at least initially seems to be univeralizible.
At least, it seems to "scale" better than "I will declare this land as mine to own and control even when I don't actively use it", which is one of our current maxims.