As a foodie, I personally love to eat sea snails. However, natural resources aren't infinite. I haven't eaten the giant sea snail of Vietnam either. I've been eating Vietnamese food every now and then. What I realize is the ecological role of crown-of-thorns starfish (to regulate coral overgrowth). However, crown-of-thorns starfish can become a pest in huge numbers. Centipedes and spiders have their role but an infestation is another problem. An infestation of crown-of-thorns starfish is bad for the environment.
The giant sea snail ironically eats these crown-of-thorns starfish. People should start to think of the ecological value rather than demand it for the sake of it. It's a truly magnificent work of nature. There's the need to harvest anything conservatively. It's all about respecting the circle of life.