I agree absolutely with your point Ekka that managers/owners of trees have to take responsibility for their trees, and as skilled and qualified people we should be the ones offering them a range of options as to how they can achieve that.
But we should all be careful taking egs from the press, the events in Dunham Massey Park were played for all they were worth by the press in the UK at the time. Everyone was looking for someone to blame.
The National Trust (Managers of the park) developed back in 1997 one of the better policies for managing tree risk it has been tested numerous times in British courts and was one of the first such policies to take seriously the issues arising from mixing people and trees in different conditions.
National trust assessment.pdf
I would argue that since 97' they should have improved their assessment tools, methods and training for grounds staff (since as you can see they're the ones assessing by and large). Also a big part of what I think Ekka's saying is if an Arborist spending the day in the park had been fortunate enough to see the biomechanical signs of serious trouble, then they sure as hell should make sure everyone knows about it. Thats part of our responsibility to Joe public and all their little kids.
SF