Hell yes, ethics. "When people are saying ruinously cruel things about each other, and you're the person who made it possible, it's 100% your fault. If you aren't willing to be a grown-up about that, then that's okay, but you're not ready to have a web business. Businesses that run cruise ships have to buy life preservers. Companies that sell alcohol have to keep it away from kids. And people who make communities on the web have to moderate them."