I am sure a car I once owned fully intended to leave me stranded on the side of the road, so you may have a point.
Obviously, Steve is talking tongue in cheek, as cars and viruses just do what they do without malice, but your thoughts on design are interesting to consider from a philosophic position. Would God intentionally design a virus to damage and perhaps kill, to cause cancer and pain? Some may say yes, but I hesitate to do so.