Re: many packages write to `temporary-file-directory' insecurely

[Richard Stallman]

    My concern is that since Emacs is often used on large, multiuser
    systems, many of which use disk quotas, a setgid program without any
    limits on the files it creates would be a way for users to get around
    their disk quotas.  

One solution for that is to limit the format of the data
that goes in the file so as to specialize it for game scores.