I know this is talking about the Police and Australian Laws, but I also think the point of the initial post is the "picking on" of an urban rider.
I get hassled a lot by adults when I ride my bmx around. Once I was sitting on my bike on a footpath putting my helmet on. This old guy walks up to me and starts going off at me about riding on the footpath.
Here's the funny bit: I take off my helmet, stand up and look at him in the eye - then the old fella's face changes when he realises I'm not 13, but in fact 36!! This is what I said to him
"Mate, First thing, I'm not riding it. Second, by riding my bike here has meant you can park your farkin' car in the car park - so back off and think about what you say next time"
He was white as a ghost!! I guess, blue jeans, black T-shirt, black helmet on a bmx - you look like a snotty nose 13 year old up to trouble
Not some half-decent gentleman of a dude who decides to leave his car at home!!!