@OldBrushNewPaper Heh! It’s at least a more interesting explanation than “No one’s paying close enough attention to realize they ought to turn it off!”
I wonder how many people on Google+ will sign on the last day to see who else is still there. It doesn’t seem like the kind of place where a lot of people would want that last chance before the lights go out, but there’ve got to be some communities on there that will.