"There are countless ways that drones can be useful. Using one as a remote-controlled weapon is not one of them, and I question the judgment of anyone who would attempt to do so," said Peter Sachs, an attorney and drone advocate, ABC reported.
'Flying Gun' drone investigated by FAA after engineering student's YouTube video goes viral →
Peter Sachs has said he only learned of the existence of the collection in 2005, and began fighting then for the return of the posters.
German court mulls restitution of Nazi-seized art →