The NY Times' Nick Bilton took a deep dive into the world of Twitter bots, and even created his own army of Twitter bots (which the Twitter overlords murdered as soon as th article went live).
My Twitter bots resemble real people, with photos for avatars and bios. Meet Fabiola Shaffer: She is pretty, has long brown hair, is a writer and researcher in New York and loves chocolate. Karri B. Segal is a sophisticated woman in her mid-50s, works in advertising in New York and likes Etsy. Rick Engbarg is a tuxedo-wearing rocket scientist who freelances at SpaceX and lives in San Francisco.
Never mind that they don't exist (and their accounts have since been suspended), figments of a few lines of computer code. I can command them to retweet certain topics (like chocolate or Ebola), favorite a tweet or follow anyone who follows them. Compared with most bot collections, which number in the tens of thousands and are often called bot farms, my enclave of 20 bots is more like a bot petting zoo.