This comment thread is a perfect example of fanboy pile-on voting against a well-reasoned but unpopular point of view : http://news.ycombinator.com/item?id=1888239.
Don't you think turning off HN (literally) for a few hours every now and then will help? Sure, it won't be convenient and some people will complain but it's still worth a shot. It will at least improve the world's productivity by a few % points. The next Google might be born.