Why would they hate children?? help please?

It's YOUR book. if you can't come up with a plot, you shouldn't be writing the book. Furthermore, if it's not your own reason you won't be able to execute it with appropriate skill. Plus, even using someone you know as a character base can be considered plagiarism, so even if you do use one of our ideas we'll be able to sue you for all your profits, as well as make an utter fool out of you.