I didn't witness it first-hand, but he got really upset when people joked about covid because his aunt or something was a nurse. But i have no evidence that that's what led to his leaving.
I doubt he's dead. Maybe if everything was fine and he just dropped off the face of the forum one day, then I would suspect it. But didn't he somewhat announce that he was leaving?
McDogg fucked off because he was sick of Mustard, Boss and other right wing trolling dafties spamming the political forum with right wing crap, especially in a Covid thread where it was basically decreed that he was a flange for being worried about Covid. He'll return one day, along with Noble, Slice, Punk, TKO and the others who decided to form a Facebook group rather than stay here and read more banal crap from some of our daft right-wingers. MTF