OK, so it isn't the "whole" Wolgan Valley Railway formation that they are intending to restrict access to.
While I am not normally into responding to posts that are nothing more than 'wishful thinking', and as good as the intentions are, posts (either facebook or RP) that originate from people who do not even understand (or research) the current land ownership (or lease therof) of the former railway formation that is their cherished dream of saving for either one purpose or other, are hardly likely to be able to even manage collecting enough like minded people to support or form even the most basic of organisations of any kind of credibility to achieve those aims.
To "The man in Blue", while I recognise that you are 'the messenger', and applaud your reporting of this facebook entry here on RP, the substance of many of these schemes is very thin, and while I agree that an access dedicated to walkers and cyclists is a great idea, the practicality just isn't there.
If there is anything that 'should' be done, however, it would be to manage more safely the vast amount of recreational vehicular and two wheel bike traffic that uses the Newnes road, especially on weekends. From 4WD groups, right down to trail bike riders, every weekend our carpark at Clarence is full of recreational off-road users as they prepare their favourite machine for a days adventure, and all too often we see ambulances heading down after them some hours later (last Sunday was a case in point).
I have been organising track work weekends at Clarence once per month for most of this year, and while we are doing our level best to meet the demands of our Rail Safety legislation and its implementation by the rail regulator, the irony of all this is that the sheer volume of chaos and accidents on this neighbouring 'recreational' road and the frequency of its ambulance visitations on weekends is more frightening to us than any risk we are managing.