I wouldn't mind a 17S blog, as it would reach out to more people. Personally, I think a Cosmere fan should be a Sharder or Shardling, just because it seems to fit.
EDIT: I think I know why people may be scared of 17S. In my own personal experience, when I first came here, I saw a BUNCH of theories about the Cosmere that I didn't know much about. I didn't go into the theories for a while until I learned more. I think the Shardcast episodes have helped greatly with this, but that was my experience when I first came here.