Before I show you how, let's first set it up so you can hide and unhide yourself at any given moment. These few clicks will lessen the steps for you later.
Let's add the Friend Lists in your Chat window:
1. Click Chat.
2. Click Friend Lists.
So you see, it's just a few clicks and viola! You're hidden from stalker! JK :)
From here on, all you need to do is click the moon icon corresponding to the Friend List you want to talk too or hide yourself from. Not bad, huh?
What other tips would you like to know about Facebook Chat? Let us know in the comment section.