Alternatively, the RIRs might consider doing this sort of thing before allocating IPs from new blocks. I know it's not their job to make sure IPs are routable (especially not on every remote network), but as holders of all the IPs, they are in the best position to setup such test sites that would expose problems before they're dumped on members.
And it would be nice if the RIRs funded and supported the bogon project that Cymru is running now. Now that the self-organizing RIRs have reached the stage where they have all signed a joint agreement, perhaps they could consider running some joint projects like these? In the interim, perhaps you could shift this address range testing under the Cymru banner? This would make it more likely that people will hear about it because the bogon project is beginning to get some notoriety.
Or, perhaps IANA could even do this before assigning an IP block to an RIR.
IANA no longer exists. It's true that the DoC has a contract with ICANN under which ICANN performs the former IANA functions but it is a mistake to assume that there is even a single vestige of an IANA organization that can think or do anything that is not already on its list of daily activities. --Michael Dillon