Adds random eerie strings when browsing with Chrome. It was crudely made to scare a friend of mine.

paranoia.user.js

// ==UserScript==
// @name           Induced Paranoia
// @description    They're out to get you.
// @version        1.0
// ==/UserScript==


(function () 
{
  var phrases = [ 
  "They're watching you"
  , "go away" 
  , "get off" 
  , "aAWAsadm,12-9j#" 
  , "we know your every step."
  , "They're going to get you"
  , "why are you here?"
  , "you should not be here"
  , "wake up" 
  , "this is a dream"
  , "you're in a coma"
  , "this is not real" 
  , "don't you remember?"
  ];

  /* All the documents */
  var elements = document.all; 
  
  /* The total number of elements */
  var elements_length = document.all.length; 
  
  /* For looping */
  var i; 
  
  for (i=0; i<elements_length; ++i){
     /* No children? */ 
    if (elements[i].childNodes.length == 0 ){
      if (Math.floor(Math.random()*100) >= 90){
       elements[i].innerHTML = phrases[Math.floor(Math.random()*phrases.length)];
      }
    }
  }
  
}());