Robert,
I'am aware of this issue, and was under the impression that Greenpeace, thanks to its naming of names, had achieved some degree of success when in 2009 IMO adopted the Convention for the Safe and Environmentally Sound Recycling of Ships. But no, apparently Maersk feel strong enough to ignore pressure from outside, IMO included. However, on second thought: a large number of the light-blue ships are not owned by Maersk. Could it be that the renamings before their final voyage has to do with the expiry of a charter and redelivery to the owners (like Offen, Rickmers et al in Germany)?
And yes, I overlooked the fact that in the past decade whole fleets of young tankers and bulkers were sold for recycling.
All the best, Anton