Of course there is no legal obligation to behave according to the oft-unwritten polite rules of behavior around things like attribution No, there isn't. Which,

Of course there is no legal obligation to behave according to the oft-unwritten polite rules of behavior around things like attribution No, there isn't. Which, by the norms and conventions of the gift economy that open source software defines, jerks like this should be named and shamed for this sort of parasitism. Which is what this blog article is doing. You live by the sword, you die by the sword.