I’m not sure if you’re claiming that shaming based approaches haven’t been used in the past for corporate welfare campaigns, but if you are, I don’t thing this is accurate.
My impression is that advocacy groups pursue both “carrot” and “stick” strategies to pressure companies into adopting better welfare policies. I think CIWF falls more on the carrot side, but then if that doesn’t work THL comes in with the stick. For example, THL’s current campaign against McDonald’s seems mostly shame based—imnotlovinit.com.
Given that carrot+stick approaches have worked to get initial commitments, it seems reasonable that similar approaches would work to enforce those commitments.
It’s not very clear how the WASR article you linked to in “whether eating more wild-caught fish is good or bad for fish” shows what you say it shows.
Can you briefly over the basic case for switching to wild caught fish? Is it just that wild caught fish tend to be predators?