Normally, all do n't have access authority for Override signout. So if the element belongs to your ID, then other cann't do except those having the override signout authority. There is no specific option to protect I hope.
I faced a problem that after preparing package for system environment and before the execution of package by the system guys,the element got deleted and i was under sue as it affected SLAs. Thats why i raised this question. Then how to get over this problem?