Regarding life events: I quit all social media about 5 years ago[1]. People I care about know about that, and if they want to tell me about life events they do it with other means. Those who don't, they weren't really friends, just acquaintances. I am OK with that.
[1] with the exception of Linkedin, which I hate and never use, but I have been asked by people in my company to keep a profile for PR-related reasons.