I don't know, take this as you will but this wikia disagrees that Sauron could feed "bad information" via the Palantiri: http://lotr.wikia.com/wiki/Palant%C3%A

I don't know, take this as you will but this wikia disagrees that Sauron could feed "bad information" via the Palantiri: http://lotr.wikia.com/wiki/Palant%C3%ADri http://lotr.wikia.com/wiki/Palant%C3%ADri At the end of Appearance and Properties, it is suggested that Gandalf himself claimed that false images or information could not be transmitted by the Palantiri, only suggestions via the selection of what information to show.