I think that's a good list, Chris. I don't think it's necessarily saying to never buy any of these fish, but some degree of caution and responsibility must be exercised if you choose to do so. I do wish it had more specific info on why certain fish are difficult to keep. Diet, aggressive and habitat don't really tell me much, but at least it prompts me to do a little research (which I should be doing anyway) if I don't already know why these are areas of concern.
As for being caught and bought, if enough people stop buying them, they'll stop catching them. Perhaps that's not a realistic expectation, but it has to start somewhere.