Only if it is drawings of criminals, Military people carrying guns, fictional aliens or terrorists.
(please note sacrcasm)
It is ridiculous. Kids draw things that they see. If they watch sci-fi movies or even cartoons they will probably draw ray guns and the like. It does not mean that they intend to kill anyone. As a child I watched old westerns and would draw the cowboys, including their guns. I certainly had no intention of hurting anyone myself.
Unfortunately fear and political correctness gone wild has taken people to extremes on such things as this. Over-reaction in some areas and lack of action where it is needed.