gistfile1.rb

<p class="check t_and_cs">
    <%= form.check_box :terms_and_conditions %> <strong>Please tick here to confirm that you agree with these Terms and 
      Conditions.</strong>
      <%# This is a rather nasty hack - we don't need the
      hidden form as the ts and cs have to be accepted, and
      having two form elements with the same name buggers the
      jquery validation code. However, Rails yet-again fucks 
      anyone who tries to do anything that DHH hasn't, as
      'opinionated software' is basically a euphemism for
      'lazy programmers', so we can't do this server side. %>
      <script type="text/javascript">
        $(".t_and_cs input[type=hidden]").remove();
      </script>
  </p>