There was a bit of paperwork with the syringe, so out of curiosity, I picked that up too and read it.
There were two receipts from a taxi EFTPOS machine - both rejected. It looks like our litterbug caught a taxi over this way, and didn't have the required $10 in their savings account to pay the fare.
The other paperwork explained what the syringe contained - a prescription only drug for erectile dysfunction.
As we have a brothel not far away, I am guessing that some hard up (no pun intended) punter caught a taxi that they couldn't pay for, then injected themselves in the street with a drug for a service that they could not afford. I wonder if the brothel lets regulars run a tab?
I wish the cops had busted him with his pants down (assuming he injected the stuff into his bum, as the instructions said to do) and given him a stiff fine.