Maybe their preference should be taken into account, but I don't like my speech being dictated.
It's not your speech being dictated, per se; it's about being polite. Like, there's nothing stopping me from hurling fanciful insults at everybody I meet, but I also wouldn't blame other people for considering me wrong to do so.
I also find it better to say the author when commenting on articles. In cases like this it's a famous person so not so important, but generally I haven't taken the time to find out who the author is.
Could you clarify which part of the guidelines you're referencing? I looked through and I couldn't see anything obvious that I violated in that comment.