Banning the entire realm and having it work doesn't pass the giggle test. Banning the entire realm, getting immediately protested out, and having the bans revoked sounds perfectly reasonable to me, which is why I think the changes are excellent. And if the Judge is not immediately protested out for banning the entire realm, that says to me that he has done his groundwork.
Is that what was implemented. I hadn't understood this to be the case, personally, nor did I find where Tom says so.
What I did see is 1 hour per ban, plus a special surprise for the "abuser" (unknown effect past unkown limit). Theretically, one could ban up to 24 nobles in less than an hour (stacking hours as a priest and changing class right before turn change), or more reasonnably 18 nobles in as much time. Of course, such a measure wouldn't have the same impact in, say, Falkirian Freestate as it would in Aurvandil, but that's still a lot of people over very little time.
Plus the secret restriction, of course.
If banned nobles will be able to protect within the first 24 hours as you suggest, please quote me the message, as I must have missed it.