Oh, I hate the Larry Niven thing, too--and agree that in the SV verse it can't be true because of Jor-El/Louise--but I thought that the reason Clark had to give up his powers to get together with Lois in Superman II was for Nivenish reasons. So if Superman Returns is the unofficial sequel, I am assuming that universe operates under the same rules.

I guess you're right that Lois wasn't deliberately endangering Jason, but it still didn't seem like a great idea to be dragging your kid along trespassing on a boat, even if you're not expecting danger.