Ds started walking to school (10-15 minutes away) on his own age 7 (initially secretly followed by us) and had to cross not one, not two, not three but four roads without a lollipop man
And we live in an inner city suburb 

One of these is these is the very quiet and wide and straight street our house is on, with excellent sightlines. He is been " in training" on crossing this road since as soon as he could walk. His default until recently (he is now 10) was that if there was car anywhere on the street he wouldn't cross.
The second and third streets are busier but are T-junctions or cross-roads with a busier street so that the cars have to give way anyway.
The 4th "road" is the 20m of blocked off street just before the school, so there is only the odd car going in there to park.
Last year age 9 (and for the last couple of weeks of term the year before, when he was 8) he started walking home from school on his own as well.
I am determined not to let aother people's paranoia get in the way of me encouraging ds to be independent and to learn to assess risk for himself.
We have also been told off in the past by the Out of School Club for not having dressed him warmly enough on summer outings. This is the child that insists on going out and playing in the garden in the winter in the cold and/or rain in nothing more than a football strip. He doesn't like being over dressed (unlike his mum who feels the cold
)
We really are losing our sense of perspective and priorities. My dad made the telling observation that if anything were to happen to ds (or any other child), nowadays, instead of blaming the perpetrator (as would have happened in the past), it is the parents who would be "blamed" 
As an aside, English schools seem to be much stricter about not letting kids leave the playground unaccompanied. I am not aware of many (any) schools in Scotland that impose such restrictions - certainly not by age 7.