The domain name situation is a little different at least because there is institutions in place that protect people who have valid rights to use a domain name (eg trademarks)

Preaching to the converted here but... the domain name system is set up to deal with end users, the RIRs are not. Try telling the owner of "beer.com" that he/she has to give it up to a brewery just because they make "beer". vs telling an ISP that since they are insolvent the RIR is taking back their resources and allocating them to someone else. There is really only 2 options here, they ignore the RIR and keep using the resources, or they�concede�and give them back. If they keep using them without permission and that activity became common place, it won't take long for a system to be put in place (forgive me if there already is) whereby you must register your routes with the RIR and other networks can dynamically verify the authenticity of your routes by AS path say.

Or just upgrade to ipv6. Print so many IPs that they become worthless, bit like the zimbabwean dollar.

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