Certain spots on the Stave, Vedder, Capilano, amongst a few other places always have violators during the peak seasons.
The last 3 times I have peeked at Cable Pool @ Cap there has been nothing except deliberate snagging. One person is a member of this site I recognize from pics.
BTW you are terrible at snagging. Another time this year a couple kids I recognize from this site as well were trying to net stale pinks
Secret is safe as touching moldy fish is punishment enough.
My point is there is no fear amongst these goofs that they will get caught and a steady patrol and presence at popular meatholes would help deter them. I think also signage would help. Clear rules and regs placed at the popular meatholes with fines listed.