There seems to be a rule for pro-bono advertising - the grammar and spelling usually sucks. The illustration however, is lovely.
Tuna industry must chart future with ‘less boats, more fish’ says Greenpeace. They do know their grammar, actually, as they write We need fewer boats, more fish to save our oceans, but that wouldn't fit as nicely on the poster.
— Greenpeace (@Greenpeace) May 24, 2012