The offending vessels have to be somewhat specialized, and should be simple to track from orbit. They need to be sunk and the survivors left for the sharks.
Well that would require governments ( USA, Japan, Britain) to do what you suggest. I can see the US taking the lead, but not being really put on the front burner. The whole Indonesia/Malaysia area is a pirate area. I would make an assumption that most ships sunk during the war were not war ships but transport vessels for war supplies. Of course one thinks of the battle of the Atlantic. Patriots manned those too. But the Atlantic isn’t the poverty stricken areas of the western Pacific/Indian ocean.
Not defending them. Just stating facts. I would welcome intervention by the war participants whose hero’s graves are being plundered. I just don’t see it happening to any great degree.
The ships Paul Allen is finding now are far too deep for a plunderer to get to. 0n the other hand, USS Houston, which went down in relatively shallow Dutch East Indies waters, has been hit, as have many Dutch and British ships sunk by the Japanese invaders. I agree there is a special place in hell for people who toss what is in reality a war grave.