how to block someone of facebook without removing them from friends?

[Collin W]

When you click on the chat thing on the bottom of the screen, there is a little button that says "Friend Lists". Put all the people you want to talk to in one list, and all the people you don't want to talk to in another list. When you pull up the chat window you have the option to appear online or offline to each list. If you hover over the little switch next to the name of the friend list, it will say either Go Online or Go Offline. I guess you could put that kid in one list and have him be the only member- otherwise you could make a list of all the people that annoy you. Either way.