Prisoners do get taken in situations where they'd be taken without drones. Drones hitting support groups behind enemy lines are akin to airstrikes. When drones are used on the frontline to support ground forces, the enemy will emerge and surrender. Some Russian units in the current invasion of Ukraine have surrendered to drones when ground forces haven't been as close as they'd like to accept the surrender.

There will always be war crimes in a conflict of any scale. That is human nature even if we don't like it. If both sides aren't doing it with drones they are doing it with something else. You now see the action in every situation because there are cameras everywhere and incentive for all sides to shape the narrative with this content.

As far as AI is concerned, there is the huge risk for problems. That said, you can have entire sectors of a battlefield that are kill zones for artillery but now you have drones taking more targeted action. Western artillery capabilities and approaches are more precise than those used by the likes of Russia, but it's a still a case of pummeling certain places. Drones hitting within a sector aren't much different and possibly have some long-term benefits.