I think your interpretation is correct, and that's how I interpreted it, but I can understand Bobertron's interpretation as well. He thought TwistingFingers was declaring Crocker's rules as a sort of apology for the accusatory "writing style of [the] post", which would as Bobertron suggests be using the declaration in the wrong direction.

I only say this because you wrote:

I don't see what other interpretation is possible, given "on the writing style of this post".