When you create a new board, there's a pull-down menu to select the category for the stock to go in, and the field is already filled in with the top selection of the menu,
"Listed or Nasdaq - Banking and Finance"
And a lot of people fail to realize they're supposed to change it, so the B&F category becomes a garbage dump. It would be cool if the field instead said,
"[Please select one]"
...and maybe people will realize they're supposed to operate the pull-down menu. That'll help keep the B&F section from gettin' so big.
Edit: or, "[Please select one, dumbass]"