title: Why is client-side validation not enough?
body: <p>I saw <a href="http://livevalidation.com/examples" rel="noreferrer">here</a> that:</p>
  
  <blockquote>
    <p>As you probably already know, relying
    on client-side validation alone is a
    very bad idea. Always perform
    appropriate server-side validation as
    well.</p>
  </blockquote>
  
  <p>Could you explain why server-side validation is a must?</p>