Well, I'm feeling a little bit frisky today, so what the heck....I'll play Devil's Advocate.

Let's start with a little Quiz: You're flying along fat dumb and happy, and the Captain (or F/O as the case may be) turns to you and says "Hey, my kid is in back. He's going to go on the layover with me, do you mind if I bring him up on the jumpseat. I promise he won't touch any of the controls and besides, 20 or 30 years ago, we used to do this all the time"

What do you say in response and why?