Report doesn't say completely "counter-productive" -I read it if it aggravates the situation it is, but there are real uses for droning.
Signature strikes by far kill the most civilians, but targeting errors have been problematic like various wedding partys.
I think the classic screw was the one in Yemen. Those should be banned at least.
may increase support for the insurgents, particularly if these strikes enhance insurgent leaders' lore, if non-combatants are killed in the attacks, if legitimate or semi-legitimate politicians aligned with the insurgents are targeted, or if the government is already seen as overly repressive or violent