Just been looking at a site and noticed something rather strange in the source code. The weird bit is in bold. This <h3> tag does not show up in the website, neither does the <h4>tag. Surely this is classed as hidden text, or am I missing something?
<!--<h3>Hosting so flexible, it's bound to fit</h3>-->
<li>Windows & Linux</li>
<li>Free setup & .uk domain</li>
<li>No annual contract</li>
<li><strong>£50</strong> of Google AdWords</li>
<h4><span>From just £5.95 a month, get upto 3 months free.</span></h4>