E.g. I don't want to be able to be told that someone's kidnapped my daughter, because then they have no incentive to do so (TDT aside)
Unless they just want your daughter, instead of wanting whatever behavior they could use her to coerce you into. So really what you don't want is a way to receive ransom demands.
I would like to make a prediction, but I'm not ready to raise the subject of the prediction just yet. So to show that it was not just obvious in hindsight, and to strengthen my precommitment to write an article about it later, here is the sha1sum of my prediction: 9805a0c7bf3690db25e5753e128085c4191f0114.