Craig
Perhaps my statement of "there is no scientific value at all" was a little unfair.

I agree wholeheartedly with you that getting the public involved with astronomy or indeed any branch of science is a good thing. If getting the public involved (and "the public" certainly includes me because, after all, what is my contribution to astronomy? I am just someone with a deep interest and curiosity but certainly not someone with the knowledge to be making serious scientific decisions) can be done via what I described as a gallup poll, then that is a good thing. However, I don't think that my opinion or those of people with my level of understanding of astronomy should be counted when it comes to decision time.
Rob, I also agree with you that "Many amateurs would have an in depth knowledge of a lot of the current research on galaxies and would have something to contribute." But I know enough to know that I do not know enough to participate in the final decision making process. (Hmm, confused by that? I am!

)
Regarding managing public perceptions, it starts with schools teaching science and having teachers who are excited about their subject. This in turn requires interest from governments in providing funding for specialist science teachers even at primary level, and especially at secondary and tertiary levels. It also comes from museums making science accessible and interesting. It comes from people like Robin Williams of ABC radio who used to (still does?) do the Science Show at 12.30 on a Saturday afternoon; a very informative and entertaining radio show. Same goes for Dr Karl Kruszelnicki. It also comes down to people like the members of little, local astronomy groups doing public viewings and also school nights.
A lack of learning about science is certainly what fosters the growth of ignorance, pseudoscience and religion.
Stuart