This is a classic though experiment. But I don't think the contract is as clear cut with a child as it is in the airplane example.

I think your example would be more fair if the guest jn the airplane was becoming violent and threatening to crash the airplane.

It's a variation of the "guy hanging on my flagpole" example. And in that example I think you do have the right to tell him to let go.

I don't think you are a good person for doing so and ultimately I think the social layer of justice (not sOcIaL jUsTiCe🤣) can sort out extreme applications of the law