Back in the day, around 10 years ago, I was working a lot with clean energy. One of the big projects was modifying human behaviour through social networks, focusing on using targeted messaging and peer pressure via Twitter, when it was still kind of big. Send messages to a big enough network of organically influential people, and all of sudden you have a full city saving some MW per day; put on a sweater if you are cold, turn off the lights when not in use, drink more water if you are hot, close your blinds to keep your house cool, etc...<p>I was happy, doing something good for humanity and the environment... then DARPA took our research, I was disheartened... and now I have no idea where or how it is being used, but doesn't seem to be helping humanity... I notice the grandchildren of this research coming up in the news, the whole Cambridge Analytica scandal seemed quite familiar, if anything I was wondering why it took so long for people to notice...<p>Anyway, moral of the story: no matter what we build, and how good our intentions, somebody will figure out how to do evil with it.