Yeah...no
My mother always told me not to take candy from strangers.
If I were a parent, I would teach my kids the same thing. TSA clerks are most certainly "strangers", in my book. I would not want my children thinking that they are to trust the clerks in any way, shape, or form; I would not want my children thinking that the clerks care about them or their welfare; I would not want my children thinking that the clerks are acceptable people to go to if they need help or are having some kind of emergency.
Pretty much I just wouldn't fly with my kids. Don't want to do post traumatic stress counseling on my own children.