For me it’s an excellent way of keeping up with family and friends around the world. Pictures and news of stuff going on in their lives helps bridge the gap between meet ups and reunions. Even my mum started using it a couple years ago so she can follow all our escapades, as well as the humdrum.

FB is like anything else in that normal usage is not a problem whereas over usage is. To be fair, nobody under the age of 30 seems to use it anymore, either. They may have an account but hardly seem to use it.