Yes it's fair. In the 2016 presidential election campaigns were using micro-targeted voter suppression campaigns that attempted to get certain demographics to stay home. From a story in The Atlatnic: "The animation will be delivered to certain African American voters through Facebook 'dark posts'—nonpublic posts whose viewership the campaign controls so that, as [campaign digital guru Brad] Parscale puts it, 'only the people we want to see it, see it.'" If the opposing campaigns had this information they could potentially re-deploy resources.

Source: https://www.theatlantic.com/politics/archive/2016/10/trumps-...