I hope that trolling can be kept out of HN by the simple goodwill of the people using the site. I can't think of many forum systems that can effectively remove the incentive to troll.

I put up a forum online for people in my journalism class. They're nice people, but something about the fact that the conversation was online turned the discussion into something pretty dumb.

My hope is that people who grow up with the internet their whole lives will realize that you still have to be civil online. It's no different than real life, yet no one is teaching you manners online.