In Australia is gunzeling something that people make fun of you for doing or are people a little more tolerant?
Well, you matter where you go people will look at you strange, and I think that is something fairly universal.
But, it really depends on where you go, who your with and what it is you are 'gunzelling'. If your out in the country side then most people wont give two hoots, but if your in the city then you might get a looking at, but no one really cares what your doing.
It really depends where you are and who your with, if your by your self and you decide to go gunzel a station or set up on the platform and photograph the trains at a station that is near schools and your there when all the schools finish then you might cop a bit of flak from kids, but if your with a friend then at least your not alone and you might get left alone.
If your with a big group, say 5 or more, as part of a meet up or a tour then you'll be fine, no one is really in their right state of mind going to cause trouble to a big group of people, especially if they're likely to offend everyone.
But in most cases and in my experience people will just look at you, see that your interested in trains and then just carry on with their life. There are not that many people that are going to stand there and abuse you for it, really, either they are mentally unstable or on drugs if they do.
My advice, if your put off exercising your hobby then be a little more discrete about it, don't draw attention to your self and you'll be fine and if possible go with a friend, that way you have support, someone to talk to, company and its safer as well.
AR