Wisconsin Public Radio had a recent story on UAVs in the state. As in other places, operators are looking at the agriculture sector to gather imagery. Law enforcement agencies have used UAVs for aerial pursuit of suspected criminals.
Any operations are restricted by Act 213, signed into place in 2013 that it is illegal to photograph someone or someplace with a reasonable expectation of privacy. As the article mentions, it is a broad wording and it mentions a flight over a private corporate property and charges were brought against the UAV operators.
Wisconsin is one of the more restrictive states per statue today, time will tell if the laws can evolve for a maximum amount of legal data capture.