I really like this idea. We have characters on the island who are buying drugs and doing other slightly shady stuff, so this would be a place that it could happen on-island. I'd love to have the chance for Robin to bust someone now and again, too. :)

If we do this, I think we should have a politically-savvy crime lord running the area. He could keep the heroes from getting too close to his "legitimate businesses" and get cases thrown out of court for improper procedure and generally keep the heroes from cleaning up the area. He could even let the heroes bust people sometimes to keep the competition out of the way.