Talkorigins is not dedicated exclusively to discussion of the theory of evolution. That a scientific subject is discussed at the website is not an indication that said subject is a part of the theory of evolution. The theory of evolution addresses only the cause of biological diversity. Any other scientific subject addressed is part of a seperate theory.
Then you do not object the removal of cosmology from public courses of education. Seeing as you seem to want to disassociate the field from evolution when they are taught hand in hand. (Note: A similar argument was used by the Kansas Board of Education) It was accepted that cosmology was a major part in "evolution".