President Obama, with all of his advisors, recently had a daughter that was visiting Mexico so obviously the Obamas listened to the entire warning US citizens about Mexico travel. If the American public gathered all of their information before making a judgement, there would be more people enjoying the beauty and history that exists in Mexico.
My best advise is to not send your common sense on vacation just because you are away from the day to day grind. Be smart and always remain aware of your surroundings and you should be just fine.