I know you're the Area Man Constantly Mentioning He Doesn't Own a TV[1], but...
Facebook probably has a profile on you containing personally identifiable information. If literally anyone who has ever had your phone number or email address also had a Facebook account, and gave Facebook access to their contacts, that's the ballgame. So maybe be a little less sanctimonious about telling others not to give away their data, because I'd bet all the money in my wallet Facebook has data on you.
[1] https://www.theonion.com/area-man-constantly-mentioning-he-d...
The same is true for many other social networks.
So while you're posting about being all smug and happy that you never signed up for one of these services, your personal data is still in their servers, ready to be exploited by both the company and hackers.
So what? That doesn't change a single thing. All you are doing with this line of thinking is blaming the victim. The fault here is Facebook's and the attacker's. No one else's.