I use face book, but have put very little info on there, not even my birthday or where I live. Most of my my friends have important details about me anyway. The reason I joined originally was to view photos of my niece who was travelling around the world. It was an easy way to keep in contact. Now it is to find out what friends, particularly those in the USA are up to. I'm nosy! I have never asked to befriend anyone, but seemed to have accrued a few friends. I ignore requests from people who I don't want to hear from. I have 'hidden' friends posts, when I became irritated, but didn't want to unfriend them for various reasons. I have become very fond of a couple of people, who I didn't know very well before. I am now in contact with people I knew when very young, which previously wouldn't have happened. I have never experienced any kind of unpleasant behaviour, but if I had I could unfriend them.