Shoot Them On Sight?
Very simply, it depends on what the law is for a given situation.
If police life is threatened, then it should be ok to shoot on sight, but only as a last resort when other methods have failed.
Absolutely agree. I'll also add that if any civilian life is threatened, weapon or no weapon, then officers should have a right to shoot when all else fails. For instance, if a dozen thugs are attacking an innocent bystander, and they won't stop despite officers orders, if there is only one or two officers, and backup may take awhile, officers need to do whatever it takes to stop the attack. In this case, deadly force may be the only option.