Yes some would say this hobby is inhumane just like zoos, dog kennels, and giant shopping centers/buildings on the green belt.
I have personally stopped purchasing fish or coral that are not tanked raised or from someone else's tank. I do not take things out of the ocean any more. I do not keep sharks, rays, or especially batfish because maintaining the proper conditions is too difficult.
If keeping Harlequin shrimp is inhumane then keeping any meat eating pet is also. I did not train the shrimp to eat the starfish that is just the ONLY thing that keeps them alive. Let me tell you the inhumane part of Harlequin Shrimp. Starfish do not ship well. MANY die in transit. I am supporting that by having these two shrimp. My issue is: I can not release the shrimp into the ocean because they have been in captivity too long. However, I was not told this when I bought the fish and found out about it after the fact. To try and minimize my impact, I only buy the hardiest species of starfish. So yes, I made a mistake in purchasing then spreading the good word about the shrimp. Ignorance is never a defense that is why I am owning my mistake. I will not be breading or replacing these shrimp.
I also think the hole into the club for feeding negates any "sound proofing" that has been done.
I have heard the filtration is a big diotimatious earth filter. I understand that is a rumor. If the owner is soooo concerned about the animals and proving the are in good hands, why doesn't he announce publicly what the filtration method is? Maybe he could give a diagram and explanation on the club's website. Zoos and public aquariums do. And yes that is his responsibility, especially if he is going to invite school children and "conservation" group to his club to see the animals.