On the first internet forum on which I spent time, in the mid- to late-90s, there was one poster who was egregiously intellectually dishonest - who regularly resorted to strawmen and ad hominems and non sequiturs and red herrings and so on, and essentially never engaged honestly. And it was so notable that his username became the forum slang term for those sorts of tactics.

Between then and now, those tactics have gone from the exception to the rule.