| Overview | Making Yourself Invisible | Changing Your Stealth Setting | Ignoring a Contact |
Changing your stealth setting allows you to appear online to some contacts and offline to others. You can activate a stealth setting for an entire group or for an individual contact.
The setting options are:
Online: Shows your true status of offline or online (the default setting).
Offline: Shows your status as offline. Once you appear to be invisible, you can change your status to online, permanently offline, or back to offline for selected contacts. Contact names appear in italics to indicate that you appear offline to them.
Permanently Offline: Shows your status as permanently offline for selected contacts. This setting remains active until you change it. The contact names appear in italics to indicate that you appear to be offline to them.
(More Details)
In your Messenger List, right-click a group name or an individual contact, and then select Stealth Settings > Setting Option from the displayed menu.
If you select Offline or Permanently Offline, the names in your Messenger List appears in italics to indicate that the contacts see you as offline.

If you really want to stop all communication from a contact, you can ignore the contact.