Well if a private company brings it out, i would be tempted to have my child done.
The other argument would be to actually do something to put these people off, if caught, PROPER punishment.. castration or having a hand cut off. Or are the bleeding hearts going to say they wouldn't want to live in a society that does that either.
Problem is, they would then go all out to not get caught. Bodies would be well disposed of/hidden in order to prevent vital evidence being found.
Its not a kneejerk reaction at all, i've lived through jamie bulger ect and have always thought the same. Phones could be thrown out of a car window, GPS bracelets ripped off and ditched.
I've said all i'm going to say in it really. Its just an idea.