title: How to stop bots and spams from submitting comments?
body: <p>Currently </p>
  
  <ol>
  <li>I am using captcha image</li>
  <li>I created text field and hide it using javascript. i want its value to be empty on server side, because bots are supposed to fill all the fields on the form. if value isn't empty it it does not process comment.</li>
  <li>I also use timestamps to check how long it took while submitting the comment. I supposed if the comment was submitted within 15 seconds, it comes from bot so i also stop processing the comment. </li>
  </ol>
  
  <p>But still I couldn't control bots to submit my comments form.
  Please help what should I do now?</p>