I have relatives and friends on Facebook. I am careful about what I post just like on other sites. I do not allow just anyone to be friends. If I do not know someone who asks to be friends, I turn them down. I get notices about listing my hometown and where I live now but I ignore them. People who know me know where I grew up and where I live. Others do not need to know. One thing I notice friends doing is listing their whole bd. That is a no-no to me and others.
I have relatives and friends; we all have email, cell phones and the USPS. I still don’t “get” facebook.