If there's one sure thing when it comes to security, it's that people make the same mistakes—over and over and over. It's something that hackers have come to count on.
Just because a system admin is a "computer guru" doesn't mean that his/her code is hack proof. Everyone can and eventually will be hacked if they are in business long enough. The key to minimizing these threats is to protect yourself by "
thinking like the bad guy" and finding a solution.