With so much currently being said about the abilities of AI to run amok, it's quite useful to turn the clock back to this documentary and appreciate that many of the issues being discussed now could have been foretold a decade ago. The focus of this rather lengthy and erratically paced film is a company called Cambridge Analytica - a business built from nothing that specialised in tracking and profiling unsuspecting internet users and then selling on that data to anyone interested in exploiting it - from corporate America to political America. Along the way, this makes a decent attempt to…