Disable My Sites and My Links in SharePoint

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
Under “User Profiles and My Sites” click Personalization Services Permissions

Select the group you want to limit the functionality for.  This might be 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”