Main purpose: to control what happens when a user clicks in or attempts to modify a "no access" field.
Essentially, I'd like to control the security dialog: the error message, the button text, and button actions.
At first I thought this might be implemented in the Security settings. But controlling the button actions leads me to think this should take the form of a script trigger.
Perhaps a layout-based trigger? OnAccessWarning? OnPrivilegeError?