Peek/Spy allow one user to watch another user. Anything output to the
   terminal being watched will also be sent to the watcher's terminal.

   The watcher may also optionally enter keyboard input for the user he
   is watching. See the PEEK Watching Subtopic: /TOGGLE_INPUT.

   You may not watch another user unless you have SYSPRV and SECURITY
   privileges, or the system manager has specifically authorized you to
   watch that user, or the user himself has authorized you to watch him
   via the PEEK/ALLOW command (see the top-level PEEK Subtopic:
   Commands ALLOW).