MANY children are abducted with harmful intent due to a systemic issue. In addition, in various flashbacks and discussions, a child is taken as a measure to keep them safe.
Characters are frequently restrained in each book in the main series due to themes of resisting and rebelling against authority and power and being captured.
One person disguises themselves as a love interest in order to get a kiss from a character. The series prequel, Fairest, also heavily deals with sexual assault and rape via mind control.
Depends on how you define damaged. Some people have their teeth altered severely, and describe pain and injury to their mouths both during that process and while using them after.
SPOILER WARNING: During the climax in Winter, a battle takes place. During the battle, there are mentions of mutilated bodies, torn faces, etc... There is also a lot of blood mentioned. It's not OVERLY extreme, but there are some gory things, so just take heed before reading!