Well, yes, you add little to legitimate dialog, but part of what you see is the contrast between the very liberal rules which govern this mailing list and the level of tolerance on the talk page of the article about a subject who is actively being harassed. If you have something to say about such harassment, you are expected to be knowledgable about it. Cla68 adopted a pose of naive ignorance. You like that pose too, and it is an effective debating technique, in fact, Socrates often used in the dialogues published by Plato. However, when you get down to cases, and there you are, in the midst of an active dispute, acting dumb, well...
None of that is "disrupting Wikipedia", though. Cla98 may have been being annoying, but that's not the same as being disruptive.