A very difficult dilemma. Since what the jerk is doing is technically legal your actions are limited. If it was a hunting situation here in NY, you could not even try to interrupt his hunt in any way without yourself being a law breaker (NOT saying it isn't an option, but it could have consequences)
Shaming him may or may not be effective, as he is obviously not a particularly sensitive human being.
Drawing the attention of the public, and other divers as Bob is doing may make the fellow uncomfortable, but then again it could bring the AH publicity he seeks.
I am not a fan of making new laws every time something goes wrong, or someone is unhappy, but it does sound like the site would make a good reserve, deserving protection.
Shaming him may or may not be effective, as he is obviously not a particularly sensitive human being.
Drawing the attention of the public, and other divers as Bob is doing may make the fellow uncomfortable, but then again it could bring the AH publicity he seeks.
I am not a fan of making new laws every time something goes wrong, or someone is unhappy, but it does sound like the site would make a good reserve, deserving protection.