Why isn't /tmp on that list? I have been using tmpfs for it like forever and I don't see a reason why stuff in /tmp should need to survive a reboot.
The problem here is the space, both /var/lock and /var/run are lightweight directories (less than 1Mb), which is not the case for /tmp : for example, if I download an item with Firefox using the "Open with" option, it's stored in the /tmp, so /tmp can go up to 100Mb or more. I have 6Gb of RAM so it's pointless for me, but for someone with just 512Mb, it is not. Mounting /tmp as tmpfs should be a personal choice. Bouska 16:49, 2 November 2010 (UTC)
"...would bring Fedora more inline with the other distributions and minimize differences between the distros." -- Thank you for this! The less needless differences the better.
Part about %ghost directories should be changed according to http://lists.fedoraproject.org/pipermail/devel/2010-November/146489.html that means don't \%ghost directories just use tmpfiles.d --plautrba