Incident a few years back.

Grandma in back realizes she somehow got through security with a little pen knife in her purse. Rather than remain silent about it, she "turns herself in" to the #1 FA, who goes into orbit. The tiny knife is passed up to us.

We play with it, realize it might kill a mouse if we work hard at it, and then have to decide what to do. #1 FA is out for blood, and our manual basically says "you MUST notify dispatch blah blah." Seeing no way to cover this up and let grandma proceed on her trip, we text dispatch.

Grandma is met by police, and taken away, at our destination. FA has triumphant look on her face.

I still feel guilty about this, but we couldn't see any way around it. The procedures were explicit, and #1 was going to be sure justice was served.