At the next meet and greet please make sure you bring a sharpie. I just got a copy of the book you two collaborated on and would love it if you guys would autograph my copy.
You might want to reread chapter 1, Taddat, "What Constitutes A Hijacked Thread". Commenting on a poster's motivations regarding a comment of his within the thread does not typically fall under the literal definition of a hijacking. Depending, of course, on how relevant the commented upon comment was to that thread.
For a good example of what does actually constitute a hijacking, or attempted hijacking, i refer you to this post here.