To begin, I think that this question would be much better if listed under the Discussion Board. I am sure that you will receive many different and educated opinions on this subject.
That being said, I do think that watching Disney movies shape the minds of very young girls. These children tend to live in fantasy worlds, enriched by the images they see when watching movies like Cinderella and Sleeping Beauty.
Regardless, these movies do show that there are evils out there. The problem with the shaping of young girls given their inability to look only at the positive. They tend to disregard the evils of the world based upon the fact that every life has a happy ending.
As for older girls, I think that their cognitive processes are a little more defined and that they can distinguish between appearance and reality. While they may wish for prince charming, they can recognize the fact that the movie is just that, a movie.