I stopped regularly using Facebook a couple of years ago. I claim to be one of the first British users, as I was an undergraduate at St Andrews when it first arrived in these shores in 2004. When the floodgates opened, and anyone could join, I knew it's day was up.
When I joined it was a genuinely useful tool for keeping track of friends and events at uni, but now it's just an irritant. Even my Dad joined.
A passing fad? If only.