LinkedIn_Aint_Facebook.js

removeFacebookContent();
window.addEventListener('scroll', removeFacebookContent);

function removeFacebookContent() {
  var els = document.querySelectorAll('.shared-image, .video-embedded');
  for (var i = 0, currEl;
    (currEl = els[i]); i++) {
    currEl.innerHTML = "!!! Content was removed because this isn't Facebook !!!";
  }
}

To avoid the error, you could just display = "none" or get fancy by adding a click to view link. I'll do that later with the Chrome extension.