I am impressed that Sugiyama's argument is so unimpressive.  Since when is it rational justification to do a business just because nobody stopping the millions of other snorkelers trampling the reefs?   So then, should I be allowed to punch out da guy in the parking lot 'cause get choke more guys getting away with more worse assaults in Hawaii?  Plainly, the reefs are being impacted by human use.  Hawaii more different now than was in the 50s, 60s, or 70s.   Get choke tours trespassing Stairway to Heaven.  Waikiki is one solid cement coastline engulfing Ala Moana, and soon swallowing Kakaako.  No get local kine waterfalls any more.  "Traditional Hawaiian culture" is one fiberglass canoe sailing around the world.  "Pearl Harbor", "Aloha," and "Sayonara" all interchangeable now.  Pretty soon, going get more homeless than locals.  So, I should have a good argument for doing business using the reefs, which shouldn't depend upon my pointing out that somebody else is more worse.