Well everyone has the potential to "crack" under some situations. One would simply have to look at the postal workers who went "postal" to see that. There are also plenty of exampls of dirty cops, FBI agents who turned, and CIA agents who were double agents.
However simply this thread was worded, it really boils down to trying to protect kids. "Gun free schools zones" are obviously places where only criminals and police carry guns. So the question remains, perhaps phrased more rationally than the TV News poll worded it, it could ask something like this:
Should we allow teachers and school officials, who are authorized by their state, to be exempt from the gun free school zone laws, and therefore be allowed to carry a concealed weapon for the protection of themselves and their students?
Now since "gun free school zones" are state laws, and since "CCW" laws are state laws, it would then be up to each state to determine how they want to qualify school employees for the exemption that allows them to carry and what other restrictions they might need to submit to to get this status.