I, personally, see absolutely no problem into making it the 'critical infra'
or 'root server' prefix, when it is documented correctly. EP.NET acts as
a neutral body, with this way kinda of a sub-RIR though. All root-servers
should be using the space then btw, not a few, but all of them.
i, both personally and professionally, think that this would not be desirable.
--
Paul Vixie