title: Any side-effects from deleting Reader and Contributor groups in TFS?
body: <p>I want to set up TFS permissions to better reflect the responsibilities and levels of clearance of different roles within my organization; I'm finding that the default Reader and Contributor groups are too coarse-grained for my needs (and too loosely named).</p>
  
  <p>To keep maintenance overheads to a minimum, I'm therefore thinking of <em>replacing</em> the Contributor and Reader groups with my own groups, but... <strong>is there any negative side effect of deleting those two groups?</strong> Does any part of TFS <em>rely</em> on them being there?</p>