The Interruption of Facebook Feature to My Eyes.

Well, Facebook is vast social network that connects people together. It helps people to connect back to their old friends and to find new friends with common interest and so on. But, it lacks for one thing, when I'm trying to forget a particular person but to remain him/her in my friend list, it keeps showing his/her profile picture on the "friends to chat" corner. That's annoying, and the feeling is very complex, I don't know how to express in words. I just hope that Facebook has that particular feature that allows me to organize who will I see in that corner.... Hmmm...