Yahoo Messenger stores your recent 5-6 status message in history.Here is trick to clear custom status messages on yahoo messenger. Sometime you may feel it is breaking privacy then you can follow below steps and you can clear the history.
Step 1: Go to Start –> Run. Type regedit and press enter.
Step 2: Navigate to below key.
HKEY_CURRENT_USER\Software\yahoo\pager\profiles\your username\Custom Msgs
Note: Replace your username with your yahoo id or profile id
Step 3: In data you will be able to see status message.Delete REG_SZ key by selecting the entry from name column.For example select 4_W and press delete.
Step 4: Now navigate to below key
HKEY_USERS\S-1-5-21-746137067-448539723-839522115-1003\Software\yahoo\pager\profiles\your username\Custom Msgs
Repeat step 3
You have done it.Restart yahoo messenger if its running.