Edited sentence: A precise strike on a large metropolitan downtown would be at risk by rare chance mishap intercept or the far more likely directed software terrorism.Additionally, insurance premiums and space law would stongly hamper any initial trials, as regular shipments would have to be small to prevent the possibility a man made asteroid strike.If inacted and enforced, reducing packets to a relatively safe 5 meters diameter and other compliance regulations should sharply increase costs, particularly in early stages