A common mistake when using dd is to create a file in /dev which fills up the space of / and may stay silent until / gets filled up by something else that will fail.
Would it be OK to add this in /etc/daily?
find /dev -type f ! -name MAKEDEV -delete
AFAIK /dev should have only MAKEDEV as a regular file.
hier(7) says /dev only have block and character devices
with the exception of MAKEDEV.
