FakeNewsify.js

(function FakeNewsify() {
  String.prototype.sarcasm = function(x) {
    return ((x || this).match(/.{1,2}/g) || []).map(s => s[0].toUpperCase() + (s[1] || '').toLowerCase()).join('');
  };

  var el = document.getElementsByTagName('body')[0];
  var n,
    a = [],
    walk = document.createTreeWalker(el, NodeFilter.SHOW_TEXT, null, false);
  while ((n = walk.nextNode())) a.push(n);
  a.forEach(node => (node.nodeValue = node.nodeValue.toString().sarcasm()));
})();