Some of the data used by Cambridge Analytica highlighted gun owners’ most personal information, like:
• If they owned cats
• Whether they were dieting
• If they were recently divorced
• Their political opinions
@ProPublica
Don't forget: Facebook sold your data (and the data from your contacts, even if they weren't FB users) to Cambridge Analytica who used it to target voters to sway them to trump.
https://www.cnet.com/news/politics/zuckerberg-facebook-data-was-sold-to-cambridge-analytica-too/