Having your data looked through and/or copied is a danger that you take any time you let someone else have unsupervised access to your computer. Bottom line is that if you're concerned about your privacy, at the very least take security measures to lock out your personal files, or back them up and delete the originals. Not all service technicians, or Geek Squad agents, are unscrupulous enough to steal personal files or snoop through your stuff, but there will always be some that will. As far as GS is concerned, as with any chain, some stores are better than others. Best Buy corporate doesn't do much to help, but most precincts have at least a few competent and reasonably compensated agents that are usually overqualified but stuck in an oversaturated field.