Myth
It doesn’t really matter what information I put on social media sites as only my friends can see it.
Reality:
By getting your privacy settings wrong or accepting people ypu don’t know as friends, you may be giving fraudsters valuable information about you and your habits. Personal details can be used to guess passwords, habits and vulnerabilities so you need to check your social media settings regularly.
All personal information is valuable and fraudsters are good at filling in the missing information.
https://www.getsafeonline.org/social-networking/social-networking-sites/