I'm going through most of them to check for FPs, but I got to a point where it would be very nice to trash messages with a score over, let's say 10.
Note that if you tag the subject line (eg. "(SPAM? 9.0)") then you can sort unread mail in your spam folder by subject line and the folder will sort by score. Then just select all the mail above your desired threshold by clicking on the lowest-scoring one and shift-click on the highest (selecting everything in the range), and hit delete.
