What comic book did you get your info from?
No one has ever been shot here, fist fights, yes. There is no territorial boundaries between the lobster men. There are a million traps along our cities coast not counting the coastline of the state, you can practically walk on them in the summer, they cross over each other and when they do you will be cut. There is an understanding in certain areas how you will set your traps, east to west, north to south etc: and if you break the trend you will lose traps, could be costly since traps cost approximately 90 bucks per trap when adding the cost of trap, rope and bouy and then add the cost of bait.
If you are a recreational lobster fisher man with limited pots 5-10, it is cheaper to buy lobsters from a commercial boat at about 5 bucks a lobster. When you live along the coast everyone wants to try their hand at lobstering.