David D'Amato

A Usenet personality was a particular kind of Internet celebrity, being an individual who gained a certain level of from posting on Usenet, a global network of computer users with a vast array of topics for discussion. Since its inception, Usenet newsgroups have attracted a wide variety of people posting all manner of fact, fiction, theories, opinions, and beliefs. Some Usenet posters achieved a certain amount of (or infamy) and celebrity within Usenet circles because of their unusual, non-mainstream ideas, or because their writings and responses are considered especially humorous or bizarre.

These individuals (or user-IDs, or pseudonyms) are noted for their eccentric beliefs and theories.

These individuals (or user-IDs, or pseudonyms) are noted for their criminal, eccentric, paranoid, or threatening behavior, or newsgroup trolling activities.

These are individuals (or user-IDs) that are unusual for reasons other than being eccentric.

These people are known for their exceptional and widely read contributions within their respective Usenet communities.

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Wikipedia