Disable MySite and MyLinks in MOSS 2007

In order to turn off or disable the MySite or MyLinks functionality you need to be an Sharepoint administrator.

-Go to the Central Administration Web Page
-Click on the link for Shared Services Administration
If you have more than one SSP, select the one that is running the MySites functionalityUnder "User Profiles and My Sites" click Personalization Services Permissions

Select the group you want to limit the functionality for. More than likely you will just have NTAuthority\Authenticated Users.
In the next screen you will see a list of checkboxes,

--To disable MySites uncheck "Create Personal Site"
--To disable MyLinks uncheck "Use Personal Features"
Once you find it, disabling the functionality is pretty easy.
Hopefully this will save your lot of efforts.