At one time, Warner Bros., which owns the rights to "Harry Potter" and its affiliates, tried to shut down the sites. The unsuccessful attempt eventually led to their inviting the webmasters of the top sites to premieres of the films and tours of the film sets, because of their close connection with the fans. Warner Bros. executives have acknowledged that many fans are disappointed that certain elements of the books are left out, but not trying to avoid criticism, "bringing the fan sites into the process is what we feel is really important."