For everyone saying it was 'different' in the 80s. Why? Do you really think nothing awful happened in those times?
I don't think anyone is saying that. They're saying that there was a different perception of what levels of independence might be expected of a 14 or 15 year old, and that risk perception varied accordingly.
I was 15 in 1985, and I used to cycle to and from my job in the shop of a late night petrol station, hitch lifts to see friends on other towns, and had been babysitting since I was 12. I doubt my parents even knew which subjects I was choosing at school, and two years later, there was certainly no question that they would be accompanying me to university open days.
My parents never left me at home alone for a week, but I certainly stayed for a week or ten days, aged 14 with a friend of the same age whose parents used to go off to charismatic Christian camps and leave her at home with some of her younger siblings -- and no neighbours as it was in the middle of the countryside. I'm not even sure they had a phone.
A friend who is slightly younger was reminiscing yesterday about how she and her sisters were sent to stay with cousins on a farm when they were aged between 10 and 12, and how the mother of the cousins 'suffered with her nerves' and spent most of the time lying down, while the girls (my friend, her sisters and cousins) daily prepared, served and cleared up dinner and tea for eight, including the farm workers, for the three weeks of their stay.
Whatever you think of the norms of the past, today's 14 or 15 year olds are psychologically younger in many ways.