Elisp security checks?

Would it be useful for XEmacs to warn if it finds lisp that is world or group writeable? It occured to me that a system cracker or prankster could subvert root's XEmacs, and install a cookie monster or something worse. What about a dump-time config option to set the group that should own the systemwide XEmacs lisp files, and if that group should have write access or not? I guess this feature might be an optional one too. Also the user's personal elisp in the home directory ought to be checked this way as well.