[rwmj]

Why echo it?

    $ cat /tmp/hello 
    hello\ world
    $ /tmp/hello
    /tmp/hello: line 1: hello world: command not found

It prints hello world :-)

[vardump]

Great idea! I improved the "program":

  $ cat >hello
  Hello\ World\!
  $ chmod +x hello
  $ ./hello
  ./hello: line 1: Hello World!: command not found

V0.2 changelog:

* fix: adheres to Hello World! standard now