I know I shouldn't be offended or bothered. It makes complete sense in a way-- I haven't talked with particular people in years and don't know if I will talk to them in the future.
But it still hurts to know someone removed me from their facebook friends.
In the end I think it comes down to different ways people use facebook. I know many use it for only their friends that they're actually in contact with. That probably makes the most sense. I tend to be more of a pack-rat--I figure even if I am not in contact with them now at one point we were closer, and I want to know what's going on in their lives. It seems like facebook is perfect for the even more distant relationships.
But at the same time it makes a lot of sense to focus in on the close friends. We'll see. Maybe I'll change my mind soon.