i think the impact collection has for the hobby is really minimal!
ive seen tons of artifical fertilizer being unloaded in the islands, just the runoff from that stuff devestates parts of the reef, i have lived in the maldives shortly after approx. 90% sps died due to bleaching and seen within 6 months the amount of new grow poping up everywhere, the problem really starts when methods like cyanide are being used to catch ornamental fish or dynamite for fishing for food. now funny enough we all want the cheapest clam, coral and fish! true? local fisherman don't make a killing in catching live stock. many would rather eat the clam then sell it for a buck!! a lot less work involved. :-?