I'm from Mexico, and some parts are quite dangerous, but not all the country. I know that most of the people that posted here are ignorant people(usually Americans, most of them believe every shit they tell them, like their wife getting pregnant for watching a 3d movie).
Anyways, if you want to be safe and enjoy Mexico go to Acapulco, Cancun, or Zihuatanejo, they are safe for tourists. So not believe the other stupid people saying that everywhere is dangerous, they are so stupid they can not see that their countries also have crime, and hell, might even have more psychos than Mexico.