When there’s a rash of marauding gangs of preschoolers terrorizing citizens in the streets; I’ll believe that the cops are considering Tasering 3 yr olds.
Never forget, the UK isn't the US. They do things different, and rather strangely, over there.
You really can't rule out their getting the idea to shoot babies ~ e.g. in their mother's arms to stop mom form picking pockets.