I have a gmail contact which I don't want them to see me online – but I still want the others contact see me online. A feature similar to stealth setting in Yahoo. How can I do that with gmail/gtalk?
[Edit]
Thanks to help from user, blocking user as offically said here is the answered.
Blocking someone will prevent him or
her from talking to you, and
vice-versa. Blocked users can't see
when you're signed in to Google Talk,
and you won't see their status in your
Friends list, either. If you decide
you'd like to communicate with someone
you've blocked, just unblock them.
Best Answer
Click the "Video & More" drop down when you hover over the contact, then select "Block". You will always appear in their list as offline.
(Edit: In Google Talk, hover over the contact and you get a down arrow. Click "Block (name)".)