Red John used to be a member of the Visualize. We know this because of the case where they found 3 dead bodies on the basement of an old Visualize farm. On that episode Lisbon also found out Ray Haffner was on that farm too, and he used to be a Visualize member. I cannot recall Lisbon telling this to Jane. Ray Haffner's visit to Lisbon and telling her the reason he didn't kill her, "I like you Lisbon" makes sense, because we were all wondering why didn't  Red John kill her? I don't think Bob Kirkland, Gale Bertram, Thomas McAllister know who Red John is but they obey him for sure. I think anyways it's kind of weird that Ray Haffner visited her, maybe he didn't kill her because he thinks she knows about the visualize farm thing and didn't tell Jane. 

I also think it's kind of awkward that there is Grace called Red by Rigsby in the CBI