The other bans were my fault (as in, I knew it was likely at that point) but I was apathetic at that point. Still, I appealed because they were silly bans, and my account was reinstated each time.
Who knows. I still kinda think it must have just been a mistake, or maybe something I said was taken extremely, extremely out of context (and if I lack the imagination to see how, well, shame on me). I mostly just find it humorous because this is the only ban I can remember getting in almost three decades online.