title: What's the best way of stopping users from copying and pasting text from a web app?
body: <p>The site I'm working on displays some proprietary 3rd party data that's quite valuable. As such they want to stop people copying and pasting their information. They understand that, of course, there's nothing we can do to stop users just writing down info or printing it off, but they want to make it as difficult as possible for their data to be taken.  The other big concern is performance.  The site sees a healthy amount of activity, so keeping it snappy is a big deal.</p>
  
  <p>I was hoping to get a bit of feedback from you guys on the best way of accomplishing this</p>
  
  <p>Some potential solutions that have been suggested:</p>
  
  <ol>
  <li> Use a bit of javascript to stop users hitting ctrl / right clicking (irritating and won't stop more advanced users)</li>
  <li> Use flex (very slow, but very safe since the data is binary)</li>
  <li> Create or find some funky html to image converter and display the data as images</li>
  </ol>
  
  <p>Your thoughts and opinions are very welcome.</p>
  
  <p>Thanks in advance!</p>