i guess it's just a way to increase the number of friends so that when they send requests to other people,they will check the friends list and when they see a lot of friends in his/her list,they'd think he/she must be good coz he/she has so many friends....okay,my logic sucks!but this is what i think :-S

Going to church no more makes you a Christian than standing in a garage makes you a car. ~ Garrison Keillor