I have been thinking about the "disturbing the wildlife" issue, and thought I'd put in a couple more thoughts as they might be interesting for others.
I assume we all want to fly and make photos and video with minimal impact. We want to avoid disturbing other people, wildlife, and the environment. Most of us are fairly sensitive to the public's concerns about "drones" when it comes to privacy, safety, and general annoyance factor.
Here in Alaska, though, the standard advice for someone just going for a hike is to make lots of noise - use bear bells and bear whistles, and generally do as much as possible to create loud, unfamiliar sounds in order to scare away any bears within earshot. If that doesn't work, you are supposed to carry "bear spray" and shoot pepper spray in the bear's face. Failing all of those, many people carry sidearms so they can kill a bear if necessary. Given all of those practices which are considered "normal" and "prudent", flying a quadcopter nearby is a far less invasive way to observe a bear than even taking a normal hike in bear country.
The point is, when we're working to minimize the impact of our quadcopter use, we also should consider the alternatives. It's possible that the minimal impact of a quadcopter is much better than the other options. It's quieter, safer, and cheaper than a full-scale helicopter, often lower impact than trying to access a location on foot or by other vehicle, and generally a pretty attractive alternative to other means of getting similar results.
Of course, the least disruptive thing to do would be to stay out of bear country altogether and leave it to the wildlife. For most of Alaska, that's the case already.