

Yes, but have you considered a stray comment from a week old account called ‘commiecoomdumpster42069’? Their comment is unhinged and irrelevant, but they must represent leftists and leftism everywhere, past and present. You must answer for it! It’s clearly your alt account!
No? Well I don’t believe you! Checkmate in the marketplace of ideas.

There’s a technical, often legal, aspect to blacklists. Unmanaged and unmoderated instances can be hijacked and be an actual threat with bots and so on.
But there’s another aspect, like someone’s favorite shitposter got banned for gatekeeping neopronouns, and now the entire Blahaj instance is blacklisted.
The categories are just entirely different orders of magnitude.