Tangentially, the idea that it's OK to do something which has a consequence as long as I'm ignorant of that consequence is one of the most pervasive and pernicious moralisms I know of.

I think that's a virtue ethics thing, which is why it breaks when you try to use it consequentially.

Alternatively, " it's OK to do something which has a consequence as long as I'm ignorant of that consequence", but it's Bad to deliberately create such a situation.