this may be a silly question but here goes...
few weeks back we were on a friend's boat with my father in law. had a couple of sandwiches (tuna) and the FIL wanted to throw the tuna tin overboard.
I objected, saying it was rubbish and therefore pollution. he argued that he was told it made a good 'hidey hole' for fish etc (ie - mini structure) and that because it wouldn't rust what was the harm?
I still objected and he never threw it over.
was I wrong or right?