title: Is my site safe from XSS if I replace all '<' with '&lt;'?
body: <p>I'm wondering what the bare minimum to make a site safe from <a href="http://en.wikipedia.org/wiki/Cross-site_scripting" rel="nofollow">XSS</a> is.</p>
  
  <p>If I simply replace <code>&lt;</code> with <code>&amp;lt;</code> in all user submitted content, will my site be safe from <a href="http://en.wikipedia.org/wiki/Cross-site_scripting" rel="nofollow">XSS</a>?</p>