The lawnmower ignores the boundaries and mows your neighbors prize petunia flowerbed.
Who gets prosecuted?
I assume the answer in either case is: Nobody, but you and/or the lawnmower/LLM company will be liable for the damages caused.
Though I'm sure there are 'arbitration clauses' to inhibit you from suing, they may not be legal where you are.
And what if many lawnmowers started killing/injuring people ?
And what if this a known behavior detected during QA, but the robots are sold anyway with a disclosure ?
Most of them do, but they don’t get used very often. They seem to popup in vandalism cases where public artwork has been damaged by some drunk person doing something stupid. They don’t intend to damage anything, but damage results anyway due to their negligence when considering the consequences of their actions.
I think if you want to get super technical, in the UK there isn’t an offence for damage caused by negligence, but there is an offence for damage caused by recklessness, which is a higher bar than negligence. Usually it means you knew your actions risked causing damage, and you did it anyway, even if you didn’t actually intend to cause the damage.
An example would be gluing something to a public artwork, it’s kinda obvious that would likely damage the artwork when removing the glue, but you didn’t intend to cause that damage. Or perhaps sliding down a surface and scratching it in the process. Your goal was to just slide down the surface, not scratch it, but it should have been obvious that scratching could have happened.