If you don't want other people to know when you’re online, you can disable the online status feature at any time. Here's how:

1. If you are logged into the following services, then Log out first:
• Yahoo! Groups
• Yahoo! Mail
• Yahoo! Messenger
• Yahoo! Chat
• Yahoo! Games
2. Go to the Yahoo! Profiles Page, and sign in there.
3. In the upper-right corner, click View My Profiles.
4. You'll see a checkbox that says Check the box to hide my online status from other users.
5. Checking the box will hide your online status. If you leave the box unchecked, other people will know when you're online.
6. Make sure to click the Finished Editing button when you're done.