There are two different things you might mean by "coming here." Hacker News is a pretty good place to learn interesting things, and broadening your mind is always a good thing. In that sense, "coming here" is always fine.
But if we have nothing to contribute beyond ideological ax-grinding, we should just read, not comment or vote.
Still, it nerves me a lot that you think you know when one should hang on Hacker news. This place is full of interesting technological reads; should I stop coming here because of how I think of Steve Jobs or startups or free market in general. I don't think so.