What do you think about "child leashes"?

I have been a peadiatric Nurse supervisor at a childrens hospital for many years. When my Daughter (our only child, now 17) was a little one we used what I prefer to call a toddler tether or predator protector on her. I was terrified of her being taken and I believe that if they went mainstream they would save hundreds of deaths, perhaps thousands of abductions in the future. It only takes a second to turn away and pay for groceries or inspect an item off of a shelf for a predator to have your child out the door of a store. I witnessed an abduction in progress once and while the man jogged out of the mall with the child screaming for his mother everyone stopped and stared with a sick expression of terror on thier faces (including many men) but no one moved to stop it. So I did, I sent my Mother to the nearest store to call for security/the police and as I exited the mall, thank God, I saw an officer parked down a little ways from the mall entrance sitting in has car and looking down to fill out paperwork so he hadn't seen the abductor exit. I ran over and told him what was happening, he sped off and blocked the guys car in and recovered the child. It was out of ignorance that people would look at us funny or even make rude remarks when I had my daughter on the tether. I wish they could see beyond their narrow minded opinions to see the good it can do. With a toddler tether in place, if someone tried to take your child you would feel the jerk of movement and be aware of an attack, or the predator would see your child has a tether and decide he/she would be too risky and move onto an easier target. Sad to say but as the world we live in becomes more dangerous we need to rethink some long standing opinions in favor of practical safety. Thanks and I hope all of our children are safe at home with us tonight.