If I am playing a song, right-click on it, and select 'Delete from Drive', the file is indeed deleted from my hard drive, but continues to play after deletion. Presumably, this is because the song has already been cached in the playback buffer. However, if my intention was to delete it, 99% of the time, I don't want to finish listening to it. Banshee should make this assumption and kill playback upon deletion to save the user steps.