They used it in the context of the question whether "we, the internet" have done away with it. So clearly it never referred to the legal system, and diverting to that is just kicking up sand to not let the people who are interested discussing the question as it was asked discuss it in peace.
That meaning being “the concept of innocent until proven guilty is only universally applicable in a court of law”.
So unless your psyche has any force beyond itself or it happens to be a court of law, your gotcha lacks any meaningful effect.
Beyond you grandstanding that is.