Correct.

EDIT: If I were picking nits, I would say, "'Should' does apply to paperclip maximizers - it is rational for X to make paperclips but it should not do so - however, paperclip maximizers don't care and so it is pointless to talk about what they should do." But the overall intent of the statement is correct - I disagree with its intent in neither anticipation nor morals - and in such cases I usually just say "Correct". In this case I suppose that wasn't the best policy, but it is my usual policy.