Yes, and I use both when I feel it's appropriate. However, it's still fundamentally a popularity contest rather than guidelines enforcement. If enough people simply don't like what a post has to say it will stay grey/dead.

I'm coming to the opinion that downvoting should not grey out posts, or that there should be some number of downvotes (greater than 1) required before it starts. It should be harder to suppress constructive, on-topic posts just because a bunch of people don't like the point.