All I've seen from social networking sites is people posting tons and tons and tons (and more tons) of total crap. If you like typing and have 1000's of things to say that have totally no value then social network sites are for you. That said, millions of people use them so I'd better shoot off, join some and post some junk
maybe I'll keep a record of how many cups of tea I drink each day, that might be interesting to someone perhaps?
James.