I guess sometimes when people discuss technical matters, good ideas pop up.
(Although I still think that its problematic interactions with lengthy suspends makes the whole idea of auto-deletion based purely on timestamps problematic. I can imagine more coherent mechanisms, which doesn't count time the machine was suspended against the removal clock, which check if any files are open, check if any process has its current directory in a tree, which treats trees as a whole instead of deleting leaves piecemeal only deleting the tree if all its contents are ripe, etc. That would introduce considerable complexity though. However, it is the sort of thing a good sysadmin would do before manually removing stuff in /var/tmp/, so ...)
