> (Well, I've seen glitches on ancient systems where /dev/null got
> turned into a regular file, leading to amusing messages about
> "/dev/null: no space left on device"...)

It's impressive how many things break under such circumstances, and
somewhat amazing the bizarre ways they break.  I once had that happen
to a SunOS system under my care, and it took *hours* to track it down;
one of the oddest symptoms was eventually traced to a program having
its input redirected from /dev/null - and getting stuff.

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