Shortly before the abcusers list was taken there, Yahoo announced they were going to sell their database of subscribers to anyone who'd pay. There was huge outcry that forced them to change their position, but the fact that they ever considered doing it shows them to be a bunch of slime. And their record of protecting users' privacy since has been abysmal. So, no way in hell am I ever going to subscribe to any list hosted at Yahoo.

There is a working forum at abcnotation.com, which is a well-designed and well-run site - why not use it and migrate the Yahoo message base there?