title: mailchimp hidden input field
body: <p><code>Mailchimp</code> signup forms include a line of code, which should have effect on form bot signups, but as far as I could try it out it has no effect at all. </p>
  
  <p>It goes like this:</p>
  
  <pre><code>&lt;!-- real people should not fill this in and expect good things - 
  do not remove this or risk form bot signups--&gt;
  &lt;div style="position: absolute; left: -5000px;" aria-hidden="true"&gt;
      &lt;input type="text" name="a_123456789_123456789" tabindex="-1" value=""&gt;
  &lt;/div&gt;
  </code></pre>
  
  <p>If I make the <code>&lt;input&gt;</code> tag visible and fill it in (which real people should not do), then nothing happens! Mailchimp technical support couldn't help me! Does anybody have experiences with this?</p>