I don't really see the problem to be honest? I don't see how it's aggressive? (and it's too late to edit it now anyway, so not all that much I can do about it now anyway).
I used to have deep conversations as a teenager with some of my friends, and on occasion I would say something as an argument, like "suppose I threatened to kick your ass." I meant no ill intent by it, it was an example of bad behavior used in discussion. But on a couple of occasions it was taken as a veiled threat, like I was getting upset with the discussion. Technically I did nothing wrong there, but later I came to see why it would be taken that way sometimes by some people, and stopped doing it.
I agree that using as an example the person you are talking to is permissible,
but I also agree that it is a bit preferable to instead either use a generic placeholder,
or instead of saying “If I said [X] about [someone], that would(n’t) be libel”, instead saying “If [someone] said [X] about me, that would(n’t) be libel.”
I don’t think this is obligatory though. I think that no one should feel pressured to make this change in how they phrase things, but I do think it is an improvement in phrasing.