Right or wrong, ethical or not.....one important thing to keep in mind when in a disaster area: If you walk up to a damaged dwelling (business or home) unannounced and poking around , you could end up being shot as a potential/mistaken looter. People after such a horrendous experience such as a tornado are terrified, in a state of shock, and extremely emotional and cannot be expected to exercise rational, calm behavior in a situation...especially if it is dark. Whether they can legally shoot you or not (and a resultant 20 page ST thread) is a moot point if you have a big chest wound courtesy of a 12-gauge shotgun. At the very least, law enforcement could arrest and jail you. Depending on a state's laws, they can charge you with any number of criminal counts. Something to keep in mind.