1. Make up a word that doesn't exist yet (verify with Google).
2. Start a company with that name.
3. Grow it big enough.
4. Claim your TLD.
5. PROFIT!!!!!
I guess it just depends on who you think ICANN represents and who has the default implied ownership of domains, I would like to think they are a public asset, its like radio space do you think the gov should sell life time ownership of the transmission spectrum?
RF spectrum is a limited physical resource, unlike a completely imaginary thing like domains namespace. But some regulation is needed, so you can't register "something.", then register "google.something." and start scam users.
There is no such thing as "default implied ownership", you can propose anything to ICANN.
