[**Stylish**][1] is your friend if using Firefox.
 
    @namespace url(http://www.w3.org/1999/xhtml);
    
    @-moz-document domain("serverfault.com") {
    #system-message { display : none ;}
    }

[**Stylist**][2] is your friend if using Chrome.

`Prefix http://serverfault.com`

rule 

`#system-message {display : none ;}` 

I check every day or so to see if it's still there. When it goes I'll turn the style off. 

  [1]: https://addons.mozilla.org/en-US/firefox/addon/2108/
  [2]: https://chrome.google.com/extensions/detail/pabfempgigicdjjlccdgnbmeggkbjdhd