I accidentally did that kinda stuff to myself on a production machine... accidentally.
I was *CLEARLY* in a testing environment on the OLD HPUX v8.02.something HP 817 machine.
I thought I was in root's homedir at the time. (whoops) In this particular machine with 8.02.... "/" was the homedir for "root"... and it wasn't 8.02... was 9.04f and on the new(er) box... CRAP!
Ummm yeah and its wasn't the old test machine. Whoops... all printing, data entry, workings... down while I called HP for support.
Surprisingly, HP had a script (on the machine already) to fix this. Seems I wasn't the only one to have done this in the past.