On a Unix box, try rm *.* -r.
Recursively deletes from the bottom of the file structure back uo to the top, until the disk is empty. Box will keep on running until reboot time when you find you have no OS, just a dead box.
This is only recommended if you either own the box, or you seriously dislike a person/employeer.
Think big why don't you
Making this information available to Nick (or worse - The Boy) is on a scale, equivalent to detonating a 100 megaton Nuclear bomb!
This shadow just passed across my monitor screen...........
Switch everything electrical off, take a Thermos and packed lunch and hide under the stairs for either:
a) The end of the world.
or
b) Nick forgets about this thread. (preferred option)