If we do get the ability to stop receiving Fellowship messages, I hope we will be able to choose which fellowships we don't want to receive messages from, I'd rather not see a "blanket" blocking. Some Big Bosses send out more messages than others.
Maybe put an option on the fellowship's main page to "block messages from this fellowship".. Personally, I doubt I'd block any. But I understand people wanting to, but I'd hate to see people in my fellowship block all messages just because they get sick of some of them..