There is no doubt Facebook provides an affordable way to communicate with everyone around the world. When I say affordable, I mean free.
Communication is important because so many people have moved away from their birth places and family need to be able to make contact.
Facebook contains two major aspects, the friendly connection between family and friends and to the other extreme a place for bitter banter and arguments. I am not a fan of Facebook myself, but I do see the benefits.
Keep it real and keep it civil and then the communication provided by Facebook will make it a pleasant place to visit.