There have been court battles over fish farming and the hippies have bumper stickers urging people not to eat farmed fish. They also support taking private property in order to protect streams, shoreline habitats, etc.
If fish farming is outlawed or regulated in ways we haven't seen, then courts will have precedents for tomato farming and all others. In the name of saving salmon we are tearing out renewable energy producing hydro electric dams and funding wind mill construction. But wind mills are killing migratory birds.
As is the case in most political areas, the real battle is something other than the topic in the news.
Wish I still had my pictures of all the rows and rows of nets crossing some of the magnificent rivers I fished down there in WA state! The salmon didn't have a chance!
Nothing like standing in your waders with a pole with one hook in the water, and no fish in the creel, freezing your arse off, when one of the "Chosen" show up laughing at you as he pulls in a net just overflowing with those gorgeous salmonoids!!!