It's hard to quantify ethics or morality in regulations in game laws at times, geographic traditional use practices are a prime example with bear baiting, dogs for deer, etc. But real time data through images changes the game substantially. Out of hunting seasons, don't have a huge problem with drones. It's a tool that can have it's place, if used with some common sense and courtesy. But we all know how rare courtesy and common sense are.
Run and own 20 trail cameras, and have absolutely no problems with trail cameras, but it's more of a closet wildlife photography problem I'm afflicted with. And not even an avid whitetail hunter. A trail camera that can send pics to a phone or computer via a signal of any sort in real time, is way outside of my ethical comfort zone for hunting. For a lot of people that run and use trail cameras, it becomes an addictive hobby, that is done 12 months out of the year and hunting takes a back seat to just seeing what is on the landscape. I run mine 24/7/365 and get more of a kick out of seeing does with fresh dropped fawns in the spring and how they avoid wolves and other predators like bears and coyotes than anything else. One year we elected not to deer hunt our hunting property at all for deer, after the deer numbers crashed after 2 bad winters and a high number of wolves. Most of that decision was based off data acquired from trail cameras. That year we had one doe and fawn on camera all year and she had to constantly avoid a relentless pack of wolves. We had one buck and one doe and fawn throughout most of the year and that was primarily it for deer. There's a lot of good that can come from any tool technology develops, but it can and does just as easily go the other way. It was fascinating to monitor the few deer and their movements that year the numbers tanked, in terrain that is heavily wooded, thick and flat as a pancake that is unglassable. With no ability to glass or see wildlife like in western habitats, the hunters in the eastern part of the country are at a major visual disadvantage because of cover and terrain. A trail camera is a great tool, not much different in some ways to binoculars and spotting scopes to hunting out west. Real time images though, is way out of line in an actual hunting scenario and drastically different imo. Have talked to a friend who is on this site about this stuff and neither one of us have or own a trail camera with the ability to send images because of the ethics dilemma. That might change because that is where the technology is headed and eventually it could be an option on all trail cameras whether you want it or not.
A drone in comparison to a trail camera is mobile, from an aerial perspective. Not much different than being able to use a plane or helicopter as a scouting tool, but easier to acquire and use in a manner that is not really in the best interest of ethics and fair chase.