alt Hacker NewsWell, that depends on what we are selling. Are you selling the service, black-box, to accomplish the outcome? Or are you selling a tool. If you sell a hammer you aren't liable as the manufacturer if the purchaser murders someone with it. You might be liable if when swinging back it falls apart and maims someone - due to the unexpected defect - but also only for a reasonable timeframe and under reasonable usage conditions.
I don't see how your analogy is relevant, even though I agree with it. If you sell hammers or rent them as a hammer providing service, there's no difference except likely the duration of liability