I can never understand why people would have such large friends lists. Now, I've gotten a lot of friend requests (some are obviously randomly sent, others from people who I may have talked to like once in four years of high school, another from some thug who lives 2 houses down from me...). I only add people who I've 1) talked to on a regular basis and 2) actually like. I'm also pretty paranoid/antisocial when it comes to the internet so I can't fathom why people would have hundreds of "friends".
So, what's the motivation to have so many "friends"?