The problem is almost certain to get worse, spreading to even more areas of life as bots are trained to become better at mimicking humans. Given the degree to which product reviews have been swamped by robots (which tend to hand out five stars with abandon), commercial sabotage in the form of negative bot reviews is not hard to predict. In coming years, campaign finance limits will be (and maybe already are) evaded by robot armies posing as “small” donors. And actual voting is another obvious target — perhaps the ultimate target.So far, we’ve been content to leave the problem to the tech industry, where the focus has been on building defenses, usually in the form of Captchas (“completely automated public Turing test to tell computers and humans apart”), those annoying “type this” tests to prove you are not a robot. But leaving it all to industry is not a long-term solution.