Assuming I'm not further contributing to an inappropriate thread: Typically, you may use the amount of force reasonably necessary to resist or prevent an abduction, but only the amount reasonably necessary, and no more. This may include deadly force. Jurisdictions vary.

Even those accused of the most loathsome crimes still deserve a fair trial. A nineteen year old girl having consensual sex with her seventeen year old boyfriend might be guilty of a criminal sexual offense against a minor, as might a mentally challenged sixteen year old, more or less innocently "playing doctor" with a younger playmate.

I know that's not what people are thinking or suggesting, but every case is different and unique. But for the most egregious cases? A death penalty should perhaps be an option.