Re: How is Facebook useful?
most things are as useful or useless as we make them. How is going to a movie "useful" for example. In terms of FB it's a great way to stay in touch with friends, share photos, links, etc. sparing many emails to many people, phone calls, etc. FB is also easy enough to casually participate & restrict info to your friends, etc.
If you're a social recluse though FB makes little sense. For me using FB to check in to every event in your life or play games is absurd, but that fills the monotony of people's daily grind and some dig it... glen