There are a few components to this that I can see being frustrating.
One is that many people here likely had a more free roam childhood and this kind of behaviour from law enforcement and society in general is quite peculiar and off-putting. Being socially outcast because I let my child walk to the store is one thing. Being actually arrested and threatening to remove the parent of a child in the name of their safety is another.
Another part is the data / justification for this behaviour. From 1999 to 2010 at least, it seems that motor vehicle accidents are the number one cause of teenagers dying. Then it's homicide and suicide. Homicides are mostly committed by people the person knows. I don't have a full complete data set here but ~85% of homicides against youth are committed by family members or people that know the family. Not strangers. It's not to say you should't protect your kids from strangers, just that... walking to the store isn't that.
Another part is the data / justification for this behaviour. From 1999 to 2010 at least, it seems that motor vehicle accidents are the number one cause of teenagers dying. Then it's homicide and suicide. Homicides are mostly committed by people the person knows. I don't have a full complete data set here but ~85% of homicides against youth are committed by family members or people that know the family. Not strangers. It's not to say you should't protect your kids from strangers, just that... walking to the store isn't that.