Yes; this in no way proves those MAC's are coming from the people themselves. You would need to go into the forest and put all wireless devices into a Faraday cage/bag and then test. Count addresses vs people. Have people walk out of range to see if the address is no longer listed, etc etc.
Couldn't that just be all kinds of devices in the grocery store?
Or people with smart phones and smart watches, all broadcasting on bluetooth?
Yes; this in no way proves those MAC's are coming from the people themselves. You would need to go into the forest and put all wireless devices into a Faraday cage/bag and then test. Count addresses vs people. Have people walk out of range to see if the address is no longer listed, etc etc.