I talked to a lady just the other day that does missionary work in Mexico about the safety factor. The lady seemed to think it was safe to travel back and forth and live for extended periods of time in Mexico. She acted like I was over-reacting to media reports.
U.S. schools still take students to Mexico for sports, and other activities. I saw a high school van load of band students return from Mexico just the other day. There is no way I would consider allowing a child of mine to travel to Mexico as if nothing is going on there.