W O G mate
Dusa = Slovenian or eastern European person, formerly Soviet Russian colonies Checkoslovakia or from one of those countries formerly known as Yugoslavia.
hacker = common term for "tagger"
07 = ?? seventh person on tagger clan called Dusa??
Shouldn't be too hard for the WA plod to find him.
If recall correctly they were repairing/replacing some of those big arse tarmac lights down that end the other day, maybe they went tech.?