How to remove "Edit in sharePoint Designer" from Site Actions menu

Suggested by this thread: http://social.msdn.microsoft.com/Forums/en-US/sharepoint2010general/thread/46c9b89b-bec8-4335-9096-d7bf7a8114f4/

Hide Edit in SharePoint Designer:

• In Central Administration you can disable SharePoint Designer at the Web application level - Manage Web Applications > Select your web app > In the ribbon click on the General Settings Dropdown > Select SharePoint Designer. When the settings page appears, deselect the "Enable SharePoint Designer" checkbox then click OK. You'll obviously need Central Admin access to use this method.
• At the site collection level, in Site Collections Administration section of "Site Actions > Site Settings" at the site root, click on the "SharePoint Designer Settings" link. Same options as Central Admin appear - Uncheck the "Enable SharePoint Designer" checkbox then click Ok. You'll need to be a Site Collection Administrator to use this method.
• Note - Site Collection administrators will always be able to edit in SharePoint Designer 

Above does not work, after I made above suggested changed in CA, the option is still available. However, the capability of editing in SharePoint Designer is disabled.