I'm on facebook as well about a week ago an old classmate of mine added me as a friend. What blew my mind about this is her and I never spoke to each other during school, heck in fact we hated each others guts.
Beware of friend-count boosting. Peeps who you didn't speak to at school - and if you saw them on the street, you'd hardly acknowledge each other - but are quite happy to have you sitting in their 'Friends' list, reading their hourly updates.
It's a big ball of self-serving if not self-conscious identity-forging.
