Yes. I have. But snce you seem to be reading my comment as some sort of stammering contradictory statement of the obvious, I will clarify.
The reason a security officer will view a child as a potential threat is not because he has a sad miserable view of life where everything and everyone is a threat, it's because: sometimes children are threats.
The reason a security officer will view a child as a potential threat is not because he has a sad miserable view of life where everything and everyone is a threat, it's because: sometimes children are threats.