I don't like Facebook much. I've never completed my profile. The only reason I have one (basic profile) is for managing pages - my page for self-promotion and some of my customer's for the same reason. Otherwise I'd delete it.
I'm not worried about privacy much, but I never receive anything incoming, because of the flow of Racist crap that ended up attached.
Back in the early stages it shocked me. People in the bike industry particularly, that I had accepted friendship requests from - who were nice enough in real life - turned out to be complete rednecks and islamophobes online - re-posting far right bullsh@t that showed up on my timeline.
I don't know what the solution is, but as often discussed on Cake, there's a real problem with a lot of platforms for spreading and cultivating the stupid.