Tip #7 How to : Appear offline on chat to some ( selected ) friends

There is always that one friend that wants to chat on Facebook. He/She is becoming really annoying and you want to avoid talking to that person. Well, you can pretend you are offline when you're not. Follow the next steps.
Simply open the chat window, click the settings icon and move to Advanced Settings. There you can customize your settings in order to appear offline to certain people on your friends list.