Down here I don't think they chip the crabs but if enough people complain about a certain area they will set up cameras in the mangroves with a set pot. I started a thread on another forum about nominating areas as the fisheries were happy to do something about it and got little response, those that complained the most about share farmers said nothing, only a few responses. I suspect a lot of pots (cheap thin rings) drift with the big runs at night around a full moon. Another thing I would like to see enacted is to have the lines weighted at 1 meter below the float, saves being cut by idiots who come to close and even helps with drag during big tides. It never seems to get any better.