1. The Pied Piper of Hamelin;
The children are sold to the Piper to get rid of the rat problem.
Goldilocks kept as a pet by a family of bears, fattened up and raised alongside the youngest, then slaughtered.
3. Red Riding Hood
Red is the secret sign of children sent to Grandma Werewolf.
4. Hansel and Gretal
Same as above, except for Grandma Witch.
5. Princess & the Pea
A test of Virginia Intacta by the underly unendowed.
I will stick to the bowlderised versions, thank you.