I have to agree with that last posting.
When I was PV'ed, I was warned not to make any "joking" responses to anything. What I said had to be taken at face value.
The same goes here. There are no jokes in Aviation Security. There is nothing funny about having a gun or a bomb on board an aircraft. This policeman should have known better, and should have displayed better judgement. If, as captain, I knew about such an incident, and was asked if I was willing to carry him, my answer would have been firmly in the negative.
Perhaps we can understand why he is only a traffic cop.