We have some usability changes in the works for JoeUser 2. Here are a few highlights:

1) Ignore user. A given user's posts would simply no longer show up (though their comments probably would as there'd be a significant slow down there).

2) Filter category.  Categories you're not interested could be turned off and the site would re-adjust based on that.

3) Blog Friends. You will be able to set given users as friends and be kept up to date on what they're doing on your own blog on your dashboard.

4) Restricted. This will be a new system in which we can isolate users who have trouble playing nice to their own blog without having to ban them.  We are going to be integrating JoeUser into Impulse and we users prone to flaming and insulting users will likely end up restricted. They'll still be able to blog but they won't be able to particpate in other blogs or on the forums.