That's actually a good point, your markup can reveal some info about you. Like, today this kind of info is mostly unnoticed, because there are too much details in the world and too few eyeballs to notice them. But in the (not so distant) future AI agents might be able to do a lot of inference by drawing from info like "this person hand-authored their website since the 2000s and cared a lot about obscure details etc etc"

Specially if the context size grows to the point that wasting tokens on such trivia is not seen as too wasteful