Once a question has -8 votes, that's it - it disappears. Perhaps we might discourage users from downvoting more at that point(i.e once it hits -8), because any more downvotes are functionally meaningless, while an upvote may help salvage something. But once it's at, say, -10 or -15, any downvote behavior is merely a wasted click. Unless that user truly wants to downvote it, which leads to the idea of:
How about making a bold generic downvote symbol once a question hits -8
What about if we said, OK since it's -8, let's delineate that by marking it so and keeping it fixed at -8 even if it gets ten more downvotes( which still reflect on the reputation, even though for newbies and drive-by's they get stuck at "1" rep anyway ).