For computer scientist Hany Farid, developing image analysis tools that can stop illegal content online is not enough. He says we all need to take responsibility, not least the companies that lobby and lie hard. "We've been running full steam ahead for the last 20 years with the development of technology, and I would be the first say there are many wonderful things that come from that. But as with everything there is a dark side to this, and I don't think we're talking about it enough. Because what you hear from social media is "These things are so big, we don't know what to do about it." And my answer is, "Yeah, but you let it get that big — this is not a bug, it's a feature!" You can't build some monstrosity and say "I have no idea how to control it." We have responsibilities and we should ask these companies to be better corporate citizens."