I have witnessed the obvious snagging as well as retention of wild coho and overnight nets in that area before in years past as well as some pretty aggressive behaviour if anyone questioned the offenders.
One time a few years ago fisheries officers arrived while I was there and when asked they responded that unless there was a some kind of opening, First Nations members did not have to have a fishing licence to fish but did have to abide by the same regulations and quotas. Whether the officers would enforce the regs against the above offences knowing the storm that would erupt, I don't know.