What a brilliant place Melbourne is, I was out one night at 12.15am photographing the illuminated on street flower stalls, young guys just went past saying have a good time, no bother at all. Be a bit risky here in UK.
whereas in London, I had no qualms about taking night photos around the city, there's so many tourists and people and cops that noone would think to rob you.
and my last experience of Melbourne a few years ago was walking home from a party along a main road, to have cars drive past throwing eggs. Harmless enough, you'd think, but it left a nice bruise on my calf, could be blind if it hit my face.
Personal safety's always going to be iffy in any part of the world these days unfortunately, thankfully the only time i've ever been attacked i didn't have my camera gear, only dance shoes walking home from salsa lessons, in The Hague where i used to live. (and i've been backpacking through china, russia, almost every eastern europe country with no problem, go figure)