I found a way to make certain sub-forums "go away". There's a vBulletin trick I learned quite a few years ago that allows you to omit certain subforums from your "New Posts" search.
First, find the forum number of the forums you don't want to see via 'New Posts' by hovering over a hyperlink to the said forum. It will be the last numeric value, and looks like this:
Code:
http://www.1addicts.com/forums/forumdisplay.php?f=58
'For Sale/Want-to-buy/For Trade' = 58 (shown above)
'Politics' = 67
Then update your bookmark in your browser's favorites to this:
Code:
http://www.1addicts.com/forums/search.php?do=getnew&exclude=58,67
Add any additional forum numbers you want to exclude to the comma delimited list.