Well said, Sombi. In case you all forgot, Simba, despite being a child, DID believe he killed his father, and ran from the law. Imagine how different the movie would have been had he gone to him mother, Sarabi, instead.
Some others:
Beauty and The Beast- Young girl tames then falls in love with wild animal.
Oliver & Company- Gang leader tricks innocent orphan into joining criminal gang, makes orpan feel guilty for leaving.
Dumbo- Child born with mutation is picked on and abused by locals and even own relatives. Mother who protects him thrown in prison. Child forced to perform incredibly dangerous stunts as slave(did you ever see Dumbo get paid?).
101 Dalmations- Scrores of animals abducted by psychotic woman and apparently brainless henchmen, imprisoning innocent bystander(Nanny) in the process. When rescued by some of the animals' original family, said family becomes hoarders.
Lilo & Stitch- Delinquent child befriends and attempts to civilize extra-terrestrial. Civilization attempt(though constant subjection to Elvis Prestly music) fails miserably.
Toy Story- Beloved toy, jealous of new comer, attempts to murder(though destruction) said newcomer. Psychotic neighbor child destroys any toys he can get his hands on, whether his or not.
Aristocats-Frail rich woman leaves her wealth to beloved pets in will. Jealous butler abducts and attempts to murder said pets, including three children. Children subjected to alcoholic duck.
The Rescuers- Child abducted by senile old woman and forced into slavery by threat of alligator consumption. Slavery includes highly dangerous job.
Rescuers Down Under- Poacher captures highly endangers species among others. When innocent child falls into a trap, poacher attempts to murder him by drowning in rapid river. Albatross subjected to medical experimentation by mad doctor.
I make these films sound dark, don't I? This is fun, though.