Enter the villain in my little tale. <cue sinister music>
The drywall guys apparently don't share Scott's zeal for protecting perfectly good floors.
Always cover your floors before having drywall installed. Excess joint compound just lands anywhere.
Oh well. At least I have something to do now. Anyone with a flexible scraper/putty knife and a few spare hours is welcome to hang out with me...bonus: you can sit down while you do this task.