title: How to hide table rows containing certain keywords?
body: <p>When reading forums, I'd like to be able to have customizable keyword filters to hide certain rows.</p>
  
  <p>For example on <a href="http://investorshub.advfn.com/%22Savvy-Trades-and-Investments%E2%80%9D-26218/" rel="nofollow"><strong>this forum</strong></a>, I'd like to hide any rows for certain usernames (3rd column).  </p>
  
  <p>Is it difficult to write a Greasemonkey script that could do this, only on this site?<br>
  Or is there a Firefox addon that does this kind of thing?</p>