DIP22 - private symbol visibility

[Max Samukha]

On Tuesday, 4 June 2013 at 17:39:05 UTC, Peter Alexander wrote:
> http://wiki.dlang.org/DIP22

"I'd also throw in getting rid of the "protected" access 
attribute completely, as I've seen debate over that being a 
useless idea"

How is that useless? Any non-trivial OOP code 
(http://qt-project.org/doc/qt-4.8/qabstractitemview.html#protected-functions) 
swarm with protected methods, and rightfully so. How would one 
restrict access to members that are not part of public interface 
but should be accessible to the derived classes?