I'm not sure that would be a reasonable request. I'm not into collecting tropicals but if I was I would rely on the law, if it isn't illegal I wouldn't care about the "feeling" of any individual or group.
I'm not into collecting tropicals for a tank but I am into spearfishing, crustacean harvesting and in general getting food from the ocean. I follow the law and don't have to justify my position, however I do hear lots of negative comments even from seafood eaters.
If there is enough desire to stop the collecting here, it should translate into a change of the law. Until then ...it is what it is, I find it silly to "Strongly discourage" any behavior by just saying so. If one is into having a fish tank I bet it can get very addictive, you may desire whatever but if the person is not braking the law what can you do? no aggression can be justified really. I put myself in the place of a collector and if anyone was to bother me in any way while I'm complying with the law I would not think twice to call the police and press charges.
If anything, all the energy should be directed to change the law.
I have no problems with people who follow the law, but I don't think it is unreasonable for me to try to persuade people to act with self-restraint in a special spot. I do plan to work for official protections in this area, but that does not mean others (whether at my asking or just out of their own consideration) might not also help preserve this place, merely by deciding to not take the life out of here.
You might ignore me and it is your right to have "legal" be your only guide. However, understanding that some things might be more valuable than someone's own (and I include myself) temporary urge to "legally" take and kill, can also be part of human relations, if you want it to be.
As an example, I drool over a tasty lobster as much as the next person, but I will not take lobsters from BHB. Under any circumstances, taking lobsters, a game species, is and has been unquestionably legal. But, I realized that I can take pleasure in just seeing them (they are actually very colorful and beautiful at night), and that many other divers do appreciate them for just that. I also know that grabbing and chasing after them will silt up the place and probably ruin the experience and the area for other divers, especially if my acts are multiplied by others doing the same.
I can adopt a more generous view. I can appreciate that my actions might ruin or degrade the experience of other divers. I can appreciate that some places are just worth being there, for their own sake, without greed or desire requiring me to possess them.
Can anyone else? The decision is yours.