I think that
As long as you don't take facebook too seriously, then it's a good time waster for a few minutes. Also like someone mentioned, it's a great way to catch up with distant (physically) relatives for free.

However, once you start to go on facebook daily, develop the Pokemon "Gotta catch 'em all" attitude to collecting "friends", keep telling everyone what you had for breakfast, lunch and tea, or you think you're such a cunting celebrity that all you have to do is post an emoticon and have the same bunch of people swarm to ask why you're happy, then you're well and truly a facebook whore.
(DougQuaid Get ya azz to moars..., Thu 8 Apr 2010, 7:16, Reply)