That would be an argument to support alts natively in regards to the sub and instances you are participating in, and isn’t that compromising as it can already be checked.

I don’t even think generally anyone even tries to reveal any personally identifiable details to social network account on reddit let alone lemmy. Maybe influencers and people seeking recognition, but they are going to be using alts anyway.

Forget downvotes, if you are anyone of note and people know your username, they are going to spend hours searching through your comment history, and that’s going to be far more incriminating than an upvote or a downvote.