Jedi Legend -- I would be quite happy to see such stickers in every science textbook we have, not just those relating to evolution. For one thing, due to budget constraints many textbooks in schools today are woefully out of date, and contain errors. For another, the idea that we should teach our children to accept everything they hear without question is abhorrant to me. Critical thinking is already sadly lacking in our culture of prepackaged convenience and instant gratification, to censor those who would try to encourage it is foolish at best.
As for the motivation that placed the sticker in the textbook -- why should that matter? If I save a child from a burning building because I want to be seen on the evening news, does that mean my act is evil? If I donate a million dollars to charity because I've found some tax loophole, does that mean the government should force the charity to give back the money? This isn't a matter of whether the motivation for sticker is right or wrong -- it's a matter of whether the government is allowed to legislate on our motivations. Should we start up a "Department of Thought Police" to make sure everyone's motivations for their actions are entirely blameless?
Finally, I would like to kindly point out -- hopefully without sounding too nitpicky -- that one cannot "prove" a scientific theory. One can gather evidence to support it, and many times the evidence is overwhelming enough to merit the theory being accepted in practice as fact. But there is always a chance, no matter how remote, of the theory being overturned. One of the defining points of a scientific theory, in fact, is that it must be falsifiable. So to say that a theory is "proven" and therefore we should quell all debate on the subject is actually in opposition to one of the more important principals of science. A scientist should always be striving to prove false his own theories, it's the only way he can tell if they're true or not. Really, it should be the evolutionists putting disclaimers in the textbooks, not the creationists.
Kuat -- I apologise if I missed something that refuted my previous post, would you kindly point out which one it was? I admit I didn't read each preceeding post as thoroughly as I might have, had I more time.
Mort-Hog -- I agree, there's nothing controversial about Natural Selection. It's the theory of universal common descent that's controversial. Or maybe you haven't noticed how a flame war breaks out every time the words "evolution" or "creation" are mentioned?
In any case, I would think that to promote critical thinking would be a good thing, no matter the motivation behind it. Apparently the Supreme Court doesn't agree.