In South Australia there is a 10c refund on drink containers. People often throw these containers into bins when they have finished with them. I note that the Adelaide City Council (and probably every other Council) is delighted when people retrieve these, collect the deposit and then recycle the container. The Adelaide Central Market Authority has banned the collection of cans from bins in the market, supposedly on health grounds. I suspect that cans which have been discarded don't belong to the Central Market Authority and consequently may be taken by anyone once they are discarded?