Howdy,
There's some confusion here, by "Behe rebuttal" do you mean the
Protein Science article by Behe and Snoke?
It's your call what you wish to do regarding a discussion -- there is nothing huge at stake IMO, I just posted the suggestion because I like to see what people think of the Behe & Snoke paper and the Musgrave et al. rebuttal. However, regarding access, the Behe and Snoke
Protein Science article is no different than essentially all other journal articles that regularly get discussed (except the few that are open access journals). If you're going to limit threads based on this you're risking shutting off most of the relevant source material...
Regarding copyright, obviously one needs permission to post an article on a website (usually journals give permission to the article authors if they ask), but it is common practice to send a photocopy or a pdf to another individual with a scholarly interest in the topic. This is classic scholarly "fair use." The point of academic papers is, after all, academic discussion, not profit.