No, but it's a fair point, that it's potentially irresponsible to misrepresent a positive and indeed necessary cause such as environmentalism through a ridiculously evil supervillain like Ra's. Even if it's all in good fun and in the original spirit of the creation.
I mean, maybe if the movie was made by Glenn Beck, it would be appropriate.
I'm not exactly swayed by the argument, but it's definite food for thought.
Also, see edit, re: Luthor. You're way more up on this stuff than me, perhaps you have the answer.