When I first joined fb I had a load of people wish me happy birthday - couldn't understand how they all knew and got a bit spooked so left it. Rejoined a couple of years later and now I spend far too much time on it. Got lots of 'dog' groups I am on, and our club holds online committee meetings so we don't have to travel to discuss stuff. If I accept someone as a friend, I usually click the bit that says I will only receive important messages from them. I hate the things that come through saying 'share this with everyone you know' - usually delete them. Mainly though its a way of chatting with like minded people who you probably know a bit more than you do the people on AB, although I do like the anonymity of AB. Having said that I have met a couple of good friends through Animals & Nature, who are in my 'doggy' circle, but would not have otherwise known.