Originally Posted by StuartD

Right click on them, go to FfVb Management and choose "Ignore Thread".

If ever you want to put them back again, or put back ignored users... you just right click, go to FfVb Management and choose Settings/Options. In there you can manage all that you've ignored.
You can also set keywords to be ignored, and manage other things like the bottom menu bar. You can turn it off or change it's color... stuff like that.