Social engineering .... Because there is no patch for human stupidity.
I gotta hand it to you purehate, thats probably the best damn tag line I have seen to date; so simple yet so true. Though some of you have probably seen this article, its a great read, and an excellent example of how "curiosity killed the cat" type social engineering can get you into just about any organization.

http://www.darkreading.com/document.....svl=column1_1