The FB is very useful and you can easily get to many people, friends all over the world. For seniors who are often limited in their mobility, this kind of communication is especially useful. The great adventage of FB is individual creation of your page (photos, news, events, interests etc. who you can share with others). My experiences are positive. It is possibility to set dedicated closed group and gather people interested in. For sure you should read the rules of private policy and set to your own needs.