It is an industrial solvent used in the production of chemical weapons and it has been detected in the blood of newborns!

It has been open as a tourist destination, he wants to reopen it as a prison. I went there when I was a kid.

That is opt-in. Doesn’t make it ethical but it is a much different question. I can always leave my phone at home but I can’t opt out of Flock cameras.

It’s much more ethical than that. There are no native beings living on the Moon, and no real environmental concerns. Mars is slightly more complicated because it is possible there was once life there, and perhaps some microbes survive somewhere, but that’s unlikely.

Yes, the escape velocity is much less for both.

If .01% of the time it creates a problem that kills someone or endangers the entire ship that seems like a lot to me for something that is used constantly by the entire crew.

I’d agree, but that’s 2 sentences.