If I want to remove something, I edit as much of it as possible to be underscores and/or fake/nonsense, then delete the comment/account. So unless the service k

If I want to remove something, I edit as much of it as possible to be underscores and/or fake/nonsense, then delete the comment/account. So unless the service keeps various versions of the same comment (some may, many don't) that info is effectively gone.