Here, everyone has facebook, from your grandma to your little cousin. My family is spread all over the country and you can keep in touch via text, phone but seeing what they are doing with pictures on facebook is very convenient and helpful.
Yes, the older/younger crowd do eat up conspiracies on facebook, sadly. They also don't read news sites, all the news is from facebook and TV maybe (older crowd).
Still, you are missing out a lot if you don't have it here. For example like meeting new people even. That "friends of friends" feature is immense. Kind of a social proof that you are normal/not a creep/have friends.
In the end it comes down to education. The first 7 years at home are ridiculously important. Then you have primary school for another 8 years, which is almost as important.