Drone strikes are said to be legal because we are at war. However, the places that we conduct drone strikes, we are not at war with them. These are assassinations that are being carried out and essentially they are sanctioned murder. The US is not being called out on it because they are a super power.
War is wrong and causes much suffering. There is no reason that the USA should be attacking countries, with drones or otherwise. Drone strikes give the other side no chance to defend themselves. It is totally one sided and a huge waste of money. The people who started the war should go to prison.