Not to mention tell the operator if they are alive at all. It may not be obvious if you see from a few meters away someone who is mostly immobilized by a fallen whatever. For this sort of application, a microphone on a winched cable might be useful (n.b.: make a feature to jettison the cable if it gets stuck!).

Yes, strap a megaphone on here and now you've got a flying telephone for search & rescue as well as a chance for an aerial director to talk with folks in the ground without the need to set up a second comms channel (e.g. RF radios).