It's a legitimate question. Use of armed drones over a country is still a deployment and use of military force by an alien sovereign, the fact that we draw some sort of mystical distinction between killing people with AGMs launched from remotely-piloted drones and just sending in manned fighter-bombers to do the same thing does not mean the country where the explosions happen has to view it the same way. Killing people with armed drones on foreign territory, without the knowledge and consent of that foreign government, is fundamentally contrary to carrying on diplomatic relations with them in a 'Business as usual' fashion.