I don't know how I feel about this. Our campus bookstore has the solutions manual right next to the textbooks in most cases, sometimes saying required on the little card under it. I understand that just copying the answers out of the answer guide is wrong, especially for a grade, but, OTOH, I think they are more useful than that. For example, my orgo professor never gives solutions to problems, so without the manual, I could work all the problems in the text and still not know if I got any right, which would be unhelpful.