But seriously I would suggest that you would have some expectation of rights due to RFC2050 as much as any properity rights exist for so called legacy addresses.
After taking a cursory glance at RFC2050, i happened upon the ambiguous and unintelligable wording 'best current practice'. Even though the definition of this term was thoroughly obfuscated, i did not find LAW or JESUS SPAKE preceding any of the edicts contained within the mentioned rfc.
At any rate it sounds like a unilaterial contract change by CW, which may be unenforcable. I'd just continue to announce the more specifics for 6 months just to make it as difficult as possible for CW to re-use them.
No one will listen to your announcements because you don't matter.
It won't win CW and friends that's for sure. (hello AGIS/Net99, anyone?)
you don't need friends when people _need_ to reach your network. On an operationally related question: Do grammar and nanog go hand-in-hand or is nanog becoming (has always been?) a forum for the functionally illiterate? BR