I have not seen the movie. That said, from what I see described, it sounds like it is quite a bit more intense than the first movie and a bit much for the age range it is marketed at. I can see where it would take a parent by surprise.
Personally, I think most Disney films are really not good for the preschool set. By 6 most kids can handle most of them well, but every kid is different. MY daughter hated teh Disney animated films unitl around age 10 but she loves other thing that were more realistic
One thing I eventually realized was that scary/tense music really freaked her out. My son, on the other hand, loved Disney at a young age and handles many movies well but still HATES any kind of realistic looking violence and will leave a film if that occurs (he recently sat in the hall while his class watched a film on ancient Rome because he felt sick after the first violent scene).
I really dislike the attitude that teens need to stay on the teen board. You never see that applied to any other group. No one thinks those with disabilities should stay on that board, cruises should only go to the cruise boards or GLBT people need to stay on that board. Why the difference for teens?
There have been a number of teen posters over the years who fit in very well and offer great insights. I welcome them and their voices.
That said--I find this particular poster's signature to be rude and condescending and I do not think it is wrong to call the person out on it when her own posts contradict her high horse self assessment.. Being a teen does not mean the OP should be kept off of the board, nor does it mean she should be afforded special protection here or treated with kid gloves due to her age (IMO).