Comment 49 for bug 12893

here's another suggestion no one seems to have though of. Keep things as they are, but when the user goes to unmount the drive, pop up a dialog saying something like:

"You still have files in the trash on the drive you are attempting to remove. These files will take up space on the drive. You can delete these files, move them to the trash on your local computer, or cancel and manually fix the problem"