> changed TMPDIR to the user's $HOME/tmp > I wonder whether such systems can still be seen...
Variously, I do both that and link /var/tmp to /tmp and/or make either a small ramdisk, often not writeable by users. Tends to encourage users to keep their own scribbling in check and applications to become less hardcoded, ie: honor TMPDIR. All depends on the your local thing.
