What you are saying n2l has reminded me of something that happened in the news about a year ago...

This woman has custody of her Daughters children after she couldn't care for them (I'm not sure if she died or was sick or whatever) anyway, one of the children escaped whilst this woman had her back turned..
The child ran straight for the flooded cause way which happened to be during some bad floods and was being filmed by a TV crew.. She chased this child and caught her by the arm just as she was about to get to the water, dragged the child back quickly and smacked her bum.

All this was caught on camera by the news crew and it sparked the debate about smacking children, and because this child was not actually her child, it was major news at the time..

The news crew then went and interviewed the woman (obviously sensing a story was going to come of it) and she said she smacked out of fear, and that it would have been a lot worse if the child has actually got to the water, and that maybe that smack would make the child think twice about doing it again (as the child was too young to understand danger etc)

Anyway... a few days later they were interviewing the minister for Child Protection (who were damming this woman and trying to get the kids removed) and one smart reported asked the minister "Do you smack your kids" and his response? "You're damn right I do!"

What I'm trying to say is this... IRL things are not so cut and dry, or black and white, parents do what they think is best for their children at the time... so whilst I am going to go ahead with the putting of extra locks on doors and windows for keeping DS inside, I'm also going to go with a low voltage electric fence, because I think it's a bit like the woman who gave that child a smack, maybe just maybe, it might save his life...

AND I am happy for those who feel extremely strongly about not doing this, to the point that they are worried for the safety and care of my child, PM me, and I will give you my home address and phone number so you can call DOCS. because I think they would take one look at the dangers surrounding our house and meet DS and turn around and get back in their car..