By design, i guess it's just not encouraged. Frankly I just don't want to say no to people. And facebook is designed so that it's easy to find people you know, even remotely. I need a passive system that fits my needs.

Plus there are other ways I keep in touch with my closer circle of friends: instant messaging.

The other benefit with that is that when I say something, it isn't pushed to everyone else. Even if I delete friends, conversations will still be open.