One of the security messurements for Joomlasites says, remove the generator tag
with adding this to your template
<?php
// Remove GeneratorTag
$this->setGenerator(null);
?>
well I did this and it works great.
Just one problem
now disgus is giving it away like this

<!-- JoomlaWorks "Disqus Comment System for Joomla!" Plugin (v2.2) starts here -->

<script type="text/javascript" src="http://www.(mysite).com/plugins/content/jw_disqus/includes/js/behaviour.js">
<script type="text/javascript">
//<![CDATA[
var disqusSubDomain = 'mysite';
var disqus_iframe_css = "http://www.(mysite).com/plugins/content/jw_disqus/tmpl/css/disqus.css";
//]]>
</script>

<style type="text/css" media="all">
@import "http://www.(mysite.com)/plugins/content/jw_disqus/tmpl/css/template.css";
</style>

<!-- JoomlaWorks "Disqus Comment System for Joomla!" Plugin (v2.2) ends here -->

how can I change this?

ups, didn´t realize there is a mysite.com :), this of course is not mysite