You can tell it's Taser

With the U.K. government poised to arm police with Taser stun guns despite the fact that they killed seventy people in North America last year, I cast my mind back to a recent story from Florida, where two children were stunned.
The first was a six year old who had a piece of broken glass when he was at school and threatened to cut his leg with it, apparantly. So the policeman stunned him. The second was a twelve year old girl skipping school was picked up by a police officer, but ran off. When she ran across the road, the officer stunned her for her own safety. Given that a Taser can immobilize you from seven metres away with 50,000 volts of electricity, I wonder just how safe it is, even with police guidelines in this country that allow you to shoot someone dead for carrying a table leg and go on strike if you're suspended for your actions on full pay.
As the mother of the first child points out: "If there's three officers, it's nothing to tell a 6-year-old holding a glass, if you feel threatened, 'Hey, here's a piece of candy, hey, here's a toy. Let the glass go,'". But police may feel, as in this case, that using the gun is the only option.