Blimey, a faster response than 999 (im joking of course!)
Just had a call from the police Perry Vale SNT.
The signs are to raise awareness of personal safety and security, and are aimed at the large number of commuters who get off the train at night and immediatly get their phones, iphones, blackberry's, ipods etc out and display them to all as they prepare for their walk.
There have been robberies (time frame not disclosed) however the signs do NOT reflect any sort of increase in crime of this type, and should not be taken as an indicator of certain doom.
So, voila, speedy clarification (thank you officer ) and verification that I got it wrong. lol nothing new there.