After reading this, recognising that I am a fringe dweller, I have decided that I had better not associate with myself:
https://www.theage.com.au/business/companies/facebook-targeting-of-extremists-fringe-movements-in-australia-stokes-civil-unrest-fears-20190220-p50yyn.html
“Facebook enabled advertisers to target Australians who have expressed an interest in extremist ideologies including "fascism", raising concerns the social media platform could be used to stoke civil unrest and destabilise local politics. Ahead of a Federal Election expected to be contested heavily on border protection, Facebook's advertising tools could, as of last week, also be used to target Australians interested in "opposition to immigration" and "nationalism", the Sydney Morning Herald and The Age have confirmed.’