Though now that you point it out, it is a problem that, under this model, creating a person who you don't expect to live forever has a very high (potentially infinite) disutility. Yeah, that breaks this suggestion. Only took a couple of hours, that's ethics for you. :)

Oddly enough, right before I noticed this thread I posted a question about this on the Stupid Questions Thread.

My question, however, was whether this problem applies to all forms of negative preferences utilitarianism. I don't know what the answer is. I wonder if SisterY or one of the other antinatalists who frequents LW does.