Even in traditional engineering how can you guarantee ever eventuality that another creative mind comes up with after you designed and built the thing. I design

Even in traditional engineering how can you guarantee ever eventuality that another creative mind comes up with after you designed and built the thing. I design and build an air duct to facilitate air circulation into my buildings. If someone decides fly a drone into my air duct vents and breach the building when everyone leaves for the day then who's liable? Should I have know that years later someone would use the air vents to breach the building?