I expect this sort of action from The Yes Men, as they are 'culture jamming' activists and this is their modus operandi. Considering the levels of influence multinational corporations such as Shell have on our world and on leading world governments I don't have an issue with a little impersonation to draw attention to issues such as these. I do have an issue with a charity doing this. Funds donated by Greenpeace supporters will have gone towards creating this assassination. IMO that's not justified.