"A Twitter user can be a human and still be a spammer, and an account can be operated by a bot and still be benign," said Zafar Gilani, a PhD student at Cambridge's Computer Laboratory, who led the research. "We're interested in seeing how effectively we can detect automated accounts and what effects they have." Bots have been on Twitter for the majority of the social network's existence—it's been estimated that anywhere between 40% and 60% of all Twitter accounts are bots. Some bots have tens of millions of followers, although the vast majority have less than a thousand—human accounts have a similar distribution. Which of the following statements is NOT true?