Take a look at the films and TV shows that she has appeared in. Clearly her parents have not been too particular about the subject matter of the works she has been exposed to.
Hollywood's obsession with putting children in harm's way to elicit cheap emotional reactions from the audience is one step removed from snuff films. This is just the next step deeper into Dante's Inferno.
I saw everyone of Dakota's films except the one with Robert DeNiro. I didn't find anything taboo or sexual in them.
The girl has been blessed with uncanny talent and is merely taking advantage of it. Obviously, I wouldn't watch anything that has a sexual overtone or extreme violence at her age, but I doubt that she's going to be one of those child stars who'll later on become a trivia question.