Secretly Add Anyone to your buddy List (working)

After seeing the other thread which didn't seem to do the job I figure i'll post the real exploit which still works and might get patched soon after this being made public by me.

Easy enough
1. Goto your Yahoo! Mail Account

2. Make sure your Mail account has Chatting enabled...like this


3. Add any ID by clicking on Add as marked below


4. Make sure the Add To my Online List is Unticked (very important) as shown below


Now When you add the user, he/she won't get any notification that you added them as you are adding them to the web ****d messenger server and not the real messenger server and therefore because of this when you go online on Messenger this added ID won't show in your Yahoo! Messenger.

Note: You can only view them go online/offline through your Mailbox and not Yahoo! Messenger.

Enjoy!