I would be very interested in hearing people's opions ?regarding this aspect of current allocation guidelines.

It's a joke. Moreover, it's a stupid joke that will wreck the value of registries as sources of accurate information. If the contact person or an officer of the contact organization tells me that a prefix is now to be used by another party, whether it's bought or traded or inherited or sold or whatever, I don't care, I'll route it, provided it's aggregatable into something reasonably short. And if the registries don't update to the new contacts, so what? Sean.