WE went and saw WALL*E last week and really enjoyed it. I went expecting it to be like Happy Feet in that it would pummel me with the 'people are bad and destroying the planet' message. It had some of that...but it was not nearly the propaganda piece I thought it might be.
I think it's important to in movies that have messages that I don't like, to see what the filmmakers were intending it to say (the biggest reason I never saw V for Vendetta by the way).
Here's snips from an interview with Andrew Stanton-
The Meaning behind WALL*E
I haven't read the whole article yet, but once again, I find myself cheering the folks at Pixar!
(Oh, and yes, I DO believe that Puff the Magic Dragon was written as a children's song, not as a drug one too...) ;)