The problem I see with people like "Snorkel Bob" is they see a forest fire, and try to ban matches, when most fires are started by lightning.
There are forces at work that could destroy the worlds coral reefs within 40-100 years that has nothing to do with aquariums. It's possible in 100 years corals will be limited to aquariums, and will be extinct in the wild.
Aquarists make a convenient scapegoat and punching bag.
If they talked more about supporting more captive raised research, supporting sustainable harvests, supporting anything I would be more receptive to his ideas. But it seems all about limiting and attacking the aquarium industry, not supporting it in a constructive way.