He's just saying that this thread (created by him for the purpose of discussing specific things) should stay on topic so we don't have to wade through countless unrelated posts. People are certainly free to start threads to discuss other stuff.
I agree 100%. Why is there a multi-page argument about a ride failure from years ago? In the end, someone died, which is the real tragedy in the matter. It's annoying to have to sift through 10 pages of off topic info, and I'm sure it makes it hard for Spirit to want to come back and give us new info since we can't reasonably discuss it without going off on multi page arguments.