Thanks, exactly what I was looking for. Now, if only we could start a movement to only use BCP38 compliant ISPs. And then convince our ISPs to reject all packets from other ISPs that have been shown to be non-compliant, in case any survived.
EDIT: The way I put it may be a bit extreme, but the idea is there.
I'm not sure it's too extreme. take it to NANOG. We'd need the support of big players, much more than one-and-a-half rack operations like me. (though bcp38 compliance is much more common amongst the big players. Heck, the provider I'm moving away from doesn't do it, something I didn't know before I signed a contract. For that matter, I only do it on outgoing IPv4. I don't do it on incoming packets or IPv6. This will be corrected in the network upgrade that is in progress now, but still.)
The big problem with your proposal is verification. It seems... difficult to verify that another network properly implemented BCP38 without actually putting a probe on that network.
EDIT: The way I put it may be a bit extreme, but the idea is there.