You often get a whole batch of new spam emails come through and have to go through the filtering process for each one independently.
If we were able to construct junk filters of different types for emails that we want to deal with differently, we could name and save those filters as a list on a toolbar and simply select the appropriate one and apply it with just one click. Perhaps even apply the selected filter to several emails by multiple selections.
Eg. click the email - click the chosen filter. Job done.