Debris on Heidelberg Rd

Riding along Heidelberg Rd in Clifton Hill about 6.30PM I got this large
piece of very thick wire and metal stuck in my back wheel. Brought me to an
involuntary screaming halt and scared the bejeezus out of me. The wire has
wrapped itself around the hub about three times. Fortunately only one spoke
is buggered and a bit of metal is gouged but everything seems to work OK.
Funny thing was my wife cycled home about 3PM and remembers seeing the same
hunk of junk lying there- next time she says she'll stop and pick that sort
of debris up. First time this sort of thing is ever happened to me- usually
just flat tyres and bad drivers (not to mention bad pedestrians and bad
cyclists)