Hi Fly Bum,
You can check out the Californian Fish and Game Commission here
. You will see that four of the five are strict conversationalist. Daniel W. Richards is the only one who has a remote connection with fishing and hunting. I would expect that members of this Commission would have a background in fish or wild life biology or science. They all seem to be political appointees that are making decision about things they know nothing about. It is true there are Fish and Game scientist who can provide date if they would use it. The process for Southern California establishing the MPAs shows they don't understand the data or just reject it completely.
Fly Bum, you are correct that the non-fishing crowd is much smaller than people with fishing licenses in California. Hopefully these first fishing bans will bring more fishers into the conflict. The coastal problem is not just a problem for fishers. The Kayakers have lost some of the beaches where they launch. The boating industry in California can also be impacted. Just wait until a boat captain is arrested because he is in a non-fishing area with fishing poles on board. It won't matter that they are not fishing.
One thing that is going to help the situation is California does not have the money to hire fisheries people to enforce the new rules. Lets hope this eases the situation somewhat.