Are there people ... who need a route to flag up to someone that they are in need of immediate assistance?
Yes.
If I have any idea there is someone in need of help, assistance or guidance, whatever their signal, I will immediately offer whatever support I can.
Many years ago, I offered support and local information to the father and brother of a man who had died, in sad circumstances, at Nailsea & Backwell station, when they visited the scene. They, from - I seem to remember, Nottingham - were very grateful for my help.
CfN.