Yeah nothing new about the sunscreen. I would be interested to see how sunscreen compares to other human related issues (soil runoff, fertilizer = algae blooms, etc).
And unfortunately it's a catch 22, you can't sunscreen products in the oceans, because people will care more about their bodies than corals, you can't ban people, because if people can't go in the oceans then why go there, and being as a huge hunk of income from these tropical locations is tourist related they won't do something that would keep the tourists away. I can say without a doubt whenever I've gone to Hawaii I've been in the water every day I've been there, and yes I use plenty of sunscreen.