>> you'll be forgotten by all but your strong friends (who don't need Facebook's friend-menu to remember you).
> How is that a bad thing?
I already covered that in my original comment: it might not be a bad thing to you, but you are not everyone. There exists a significant number of people for whom quitting Facebook would have some real negative costs.
> It's not normal or healthy to try to maintain hundreds or thousands of "friendships" with people you barely know. You don't need to keep in life-long contact with some guy you spent 4 minutes talking to at a bar while on vacation 5 years ago.
That's not what I was talking about at all. I was thinking more about the kind of friendly acquaintances that you see regularly. For instance, you might have 3-10 close friends, 20-30 more distant friends, and 500-2000 Facebook non-friends. I'm talking about the second group of 20-30 friends.